net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 static struct cfg80211_registered_device *
  74 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
  75 {
  76         struct cfg80211_registered_device *rdev = NULL, *tmp;
  77         struct net_device *netdev;
  78
  79         assert_cfg80211_lock();
  80
  81         if (!attrs[NL80211_ATTR_WIPHY] &&
  82             !attrs[NL80211_ATTR_IFINDEX])
  83                 return ERR_PTR(-EINVAL);
  84
  85         if (attrs[NL80211_ATTR_WIPHY])
  86                 rdev = cfg80211_rdev_by_wiphy_idx(
  87                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
  88
  89         if (attrs[NL80211_ATTR_IFINDEX]) {
  90                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  91                 netdev = dev_get_by_index(netns, ifindex);
  92                 if (netdev) {
  93                         if (netdev->ieee80211_ptr)
  94                                 tmp = wiphy_to_dev(
  95                                                 netdev->ieee80211_ptr->wiphy);
  96                         else
  97                                 tmp = NULL;
  98
  99                         dev_put(netdev);
 100
 101                         /* not wireless device -- return error */
 102                         if (!tmp)
 103                                 return ERR_PTR(-EINVAL);
 104
 105                         /* mismatch -- return error */
 106                         if (rdev && tmp != rdev)
 107                                 return ERR_PTR(-EINVAL);
 108
 109                         rdev = tmp;
 110                 }
 111         }
 112
 113         if (!rdev)
 114                 return ERR_PTR(-ENODEV);
 115
 116         if (netns != wiphy_net(&rdev->wiphy))
 117                 return ERR_PTR(-ENODEV);
 118
 119         return rdev;
 120 }
 121
 122 /*
 123  * This function returns a pointer to the driver
 124  * that the genl_info item that is passed refers to.
 125  * If successful, it returns non-NULL and also locks
 126  * the driver's mutex!
 127  *
 128  * This means that you need to call cfg80211_unlock_rdev()
 129  * before being allowed to acquire &cfg80211_mutex!
 130  *
 131  * This is necessary because we need to lock the global
 132  * mutex to get an item off the list safely, and then
 133  * we lock the rdev mutex so it doesn't go away under us.
 134  *
 135  * We don't want to keep cfg80211_mutex locked
 136  * for all the time in order to allow requests on
 137  * other interfaces to go through at the same time.
 138  *
 139  * The result of this can be a PTR_ERR and hence must
 140  * be checked with IS_ERR() for errors.
 141  */
 142 static struct cfg80211_registered_device *
 143 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 144 {
 145         struct cfg80211_registered_device *rdev;
 146
 147         mutex_lock(&cfg80211_mutex);
 148         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 149
 150         /* if it is not an error we grab the lock on
 151          * it to assure it won't be going away while
 152          * we operate on it */
 153         if (!IS_ERR(rdev))
 154                 mutex_lock(&rdev->mtx);
 155
 156         mutex_unlock(&cfg80211_mutex);
 157
 158         return rdev;
 159 }
 160
 161 /* policy for the attributes */
 162 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 163         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 164         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 165                                       .len = 20-1 },
 166         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 167         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 170         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 171         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 174
 175         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 176         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 178
 179         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 180         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 181
 182         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 183         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 184                                     .len = WLAN_MAX_KEY_LEN },
 185         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 186         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 187         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 188         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 189         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 190
 191         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 192         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 193         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 194                                        .len = IEEE80211_MAX_DATA_LEN },
 195         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 196                                        .len = IEEE80211_MAX_DATA_LEN },
 197         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 198         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 199         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 200         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 201                                                .len = NL80211_MAX_SUPP_RATES },
 202         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 203         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 204         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 205         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 206                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 207         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 208
 209         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 210         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 211
 212         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 213         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 214         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 215         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 216                                            .len = NL80211_MAX_SUPP_RATES },
 217         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 218
 219         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 220         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 221
 222         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 223
 224         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 225         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 226                               .len = IEEE80211_MAX_DATA_LEN },
 227         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 228         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 229
 230         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 231                                 .len = IEEE80211_MAX_SSID_LEN },
 232         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 234         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 235         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 236         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 237         [NL80211_ATTR_STA_FLAGS2] = {
 238                 .len = sizeof(struct nl80211_sta_flag_update),
 239         },
 240         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 241         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 242         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 243         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 244         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 245         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 246         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 247         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 248         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 249                                  .len = WLAN_PMKID_LEN },
 250         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 251         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 252         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 254                                  .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 256         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 257         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 258         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 259         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 261         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 262         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 263         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 264         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 265         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 266         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 267         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 268         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 269         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 270         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 271         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 272         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 273         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 274         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 275                                          .len = IEEE80211_MAX_DATA_LEN },
 276         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 277                                          .len = IEEE80211_MAX_DATA_LEN },
 278         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 280         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 282         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 283         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 284         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 285         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 286         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 288                                       .len = IEEE80211_MAX_DATA_LEN },
 289         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 290         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 292                 .len = NL80211_HT_CAPABILITY_LEN
 293         },
 294         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 295         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 296         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 297 };
 298
 299 /* policy for the key attributes */
 300 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 301         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 302         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 303         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 304         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 305         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 306         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 307         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 308         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 309 };
 310
 311 /* policy for the key default flags */
 312 static const struct nla_policy
 313 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 314         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 315         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 316 };
 317
 318 /* policy for WoWLAN attributes */
 319 static const struct nla_policy
 320 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 321         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 322         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 323         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 324         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 325         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 326         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 327         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 328         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 329 };
 330
 331 /* policy for GTK rekey offload attributes */
 332 static const struct nla_policy
 333 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 334         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 335         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 336         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 337 };
 338
 339 static const struct nla_policy
 340 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 341         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 342                                                  .len = IEEE80211_MAX_SSID_LEN },
 343         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 344 };
 345
 346 /* ifidx get helper */
 347 static int nl80211_get_ifidx(struct netlink_callback *cb)
 348 {
 349         int res;
 350
 351         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 352                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 353                           nl80211_policy);
 354         if (res)
 355                 return res;
 356
 357         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 358                 return -EINVAL;
 359
 360         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 361         if (!res)
 362                 return -EINVAL;
 363         return res;
 364 }
 365
 366 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 367                                        struct netlink_callback *cb,
 368                                        struct cfg80211_registered_device **rdev,
 369                                        struct net_device **dev)
 370 {
 371         int ifidx = cb->args[0];
 372         int err;
 373
 374         if (!ifidx)
 375                 ifidx = nl80211_get_ifidx(cb);
 376         if (ifidx < 0)
 377                 return ifidx;
 378
 379         cb->args[0] = ifidx;
 380
 381         rtnl_lock();
 382
 383         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 384         if (!*dev) {
 385                 err = -ENODEV;
 386                 goto out_rtnl;
 387         }
 388
 389         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 390         if (IS_ERR(*rdev)) {
 391                 err = PTR_ERR(*rdev);
 392                 goto out_rtnl;
 393         }
 394
 395         return 0;
 396  out_rtnl:
 397         rtnl_unlock();
 398         return err;
 399 }
 400
 401 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 402 {
 403         cfg80211_unlock_rdev(rdev);
 404         rtnl_unlock();
 405 }
 406
 407 /* IE validation */
 408 static bool is_valid_ie_attr(const struct nlattr *attr)
 409 {
 410         const u8 *pos;
 411         int len;
 412
 413         if (!attr)
 414                 return true;
 415
 416         pos = nla_data(attr);
 417         len = nla_len(attr);
 418
 419         while (len) {
 420                 u8 elemlen;
 421
 422                 if (len < 2)
 423                         return false;
 424                 len -= 2;
 425
 426                 elemlen = pos[1];
 427                 if (elemlen > len)
 428                         return false;
 429
 430                 len -= elemlen;
 431                 pos += 2 + elemlen;
 432         }
 433
 434         return true;
 435 }
 436
 437 /* message building helper */
 438 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 439                                    int flags, u8 cmd)
 440 {
 441         /* since there is no private header just add the generic one */
 442         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 443 }
 444
 445 static int nl80211_msg_put_channel(struct sk_buff *msg,
 446                                    struct ieee80211_channel *chan)
 447 {
 448         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 449                         chan->center_freq))
 450                 goto nla_put_failure;
 451
 452         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 453             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 454                 goto nla_put_failure;
 455         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 456             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 457                 goto nla_put_failure;
 458         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 459             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 460                 goto nla_put_failure;
 461         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 462             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 463                 goto nla_put_failure;
 464
 465         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 466                         DBM_TO_MBM(chan->max_power)))
 467                 goto nla_put_failure;
 468
 469         return 0;
 470
 471  nla_put_failure:
 472         return -ENOBUFS;
 473 }
 474
 475 /* netlink command implementations */
 476
 477 struct key_parse {
 478         struct key_params p;
 479         int idx;
 480         int type;
 481         bool def, defmgmt;
 482         bool def_uni, def_multi;
 483 };
 484
 485 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 486 {
 487         struct nlattr *tb[NL80211_KEY_MAX + 1];
 488         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 489                                    nl80211_key_policy);
 490         if (err)
 491                 return err;
 492
 493         k->def = !!tb[NL80211_KEY_DEFAULT];
 494         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 495
 496         if (k->def) {
 497                 k->def_uni = true;
 498                 k->def_multi = true;
 499         }
 500         if (k->defmgmt)
 501                 k->def_multi = true;
 502
 503         if (tb[NL80211_KEY_IDX])
 504                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 505
 506         if (tb[NL80211_KEY_DATA]) {
 507                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 508                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 509         }
 510
 511         if (tb[NL80211_KEY_SEQ]) {
 512                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 513                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 514         }
 515
 516         if (tb[NL80211_KEY_CIPHER])
 517                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 518
 519         if (tb[NL80211_KEY_TYPE]) {
 520                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 521                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 522                         return -EINVAL;
 523         }
 524
 525         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 526                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 527                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 528                                        tb[NL80211_KEY_DEFAULT_TYPES],
 529                                        nl80211_key_default_policy);
 530                 if (err)
 531                         return err;
 532
 533                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 534                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 535         }
 536
 537         return 0;
 538 }
 539
 540 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 541 {
 542         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 543                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 544                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 545         }
 546
 547         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 548                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 549                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 550         }
 551
 552         if (info->attrs[NL80211_ATTR_KEY_IDX])
 553                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 554
 555         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 556                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 557
 558         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 559         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 560
 561         if (k->def) {
 562                 k->def_uni = true;
 563                 k->def_multi = true;
 564         }
 565         if (k->defmgmt)
 566                 k->def_multi = true;
 567
 568         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 569                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 570                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 571                         return -EINVAL;
 572         }
 573
 574         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 575                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 576                 int err = nla_parse_nested(
 577                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 578                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 579                                 nl80211_key_default_policy);
 580                 if (err)
 581                         return err;
 582
 583                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 584                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 591 {
 592         int err;
 593
 594         memset(k, 0, sizeof(*k));
 595         k->idx = -1;
 596         k->type = -1;
 597
 598         if (info->attrs[NL80211_ATTR_KEY])
 599                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 600         else
 601                 err = nl80211_parse_key_old(info, k);
 602
 603         if (err)
 604                 return err;
 605
 606         if (k->def && k->defmgmt)
 607                 return -EINVAL;
 608
 609         if (k->defmgmt) {
 610                 if (k->def_uni || !k->def_multi)
 611                         return -EINVAL;
 612         }
 613
 614         if (k->idx != -1) {
 615                 if (k->defmgmt) {
 616                         if (k->idx < 4 || k->idx > 5)
 617                                 return -EINVAL;
 618                 } else if (k->def) {
 619                         if (k->idx < 0 || k->idx > 3)
 620                                 return -EINVAL;
 621                 } else {
 622                         if (k->idx < 0 || k->idx > 5)
 623                                 return -EINVAL;
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 static struct cfg80211_cached_keys *
 631 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 632                        struct nlattr *keys)
 633 {
 634         struct key_parse parse;
 635         struct nlattr *key;
 636         struct cfg80211_cached_keys *result;
 637         int rem, err, def = 0;
 638
 639         result = kzalloc(sizeof(*result), GFP_KERNEL);
 640         if (!result)
 641                 return ERR_PTR(-ENOMEM);
 642
 643         result->def = -1;
 644         result->defmgmt = -1;
 645
 646         nla_for_each_nested(key, keys, rem) {
 647                 memset(&parse, 0, sizeof(parse));
 648                 parse.idx = -1;
 649
 650                 err = nl80211_parse_key_new(key, &parse);
 651                 if (err)
 652                         goto error;
 653                 err = -EINVAL;
 654                 if (!parse.p.key)
 655                         goto error;
 656                 if (parse.idx < 0 || parse.idx > 4)
 657                         goto error;
 658                 if (parse.def) {
 659                         if (def)
 660                                 goto error;
 661                         def = 1;
 662                         result->def = parse.idx;
 663                         if (!parse.def_uni || !parse.def_multi)
 664                                 goto error;
 665                 } else if (parse.defmgmt)
 666                         goto error;
 667                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 668                                                      parse.idx, false, NULL);
 669                 if (err)
 670                         goto error;
 671                 result->params[parse.idx].cipher = parse.p.cipher;
 672                 result->params[parse.idx].key_len = parse.p.key_len;
 673                 result->params[parse.idx].key = result->data[parse.idx];
 674                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 675         }
 676
 677         return result;
 678  error:
 679         kfree(result);
 680         return ERR_PTR(err);
 681 }
 682
 683 static int nl80211_key_allowed(struct wireless_dev *wdev)
 684 {
 685         ASSERT_WDEV_LOCK(wdev);
 686
 687         switch (wdev->iftype) {
 688         case NL80211_IFTYPE_AP:
 689         case NL80211_IFTYPE_AP_VLAN:
 690         case NL80211_IFTYPE_P2P_GO:
 691         case NL80211_IFTYPE_MESH_POINT:
 692                 break;
 693         case NL80211_IFTYPE_ADHOC:
 694                 if (!wdev->current_bss)
 695                         return -ENOLINK;
 696                 break;
 697         case NL80211_IFTYPE_STATION:
 698         case NL80211_IFTYPE_P2P_CLIENT:
 699                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 700                         return -ENOLINK;
 701                 break;
 702         default:
 703                 return -EINVAL;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 710 {
 711         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 712         int i;
 713
 714         if (!nl_modes)
 715                 goto nla_put_failure;
 716
 717         i = 0;
 718         while (ifmodes) {
 719                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 720                         goto nla_put_failure;
 721                 ifmodes >>= 1;
 722                 i++;
 723         }
 724
 725         nla_nest_end(msg, nl_modes);
 726         return 0;
 727
 728 nla_put_failure:
 729         return -ENOBUFS;
 730 }
 731
 732 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 733                                           struct sk_buff *msg)
 734 {
 735         struct nlattr *nl_combis;
 736         int i, j;
 737
 738         nl_combis = nla_nest_start(msg,
 739                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 740         if (!nl_combis)
 741                 goto nla_put_failure;
 742
 743         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 744                 const struct ieee80211_iface_combination *c;
 745                 struct nlattr *nl_combi, *nl_limits;
 746
 747                 c = &wiphy->iface_combinations[i];
 748
 749                 nl_combi = nla_nest_start(msg, i + 1);
 750                 if (!nl_combi)
 751                         goto nla_put_failure;
 752
 753                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 754                 if (!nl_limits)
 755                         goto nla_put_failure;
 756
 757                 for (j = 0; j < c->n_limits; j++) {
 758                         struct nlattr *nl_limit;
 759
 760                         nl_limit = nla_nest_start(msg, j + 1);
 761                         if (!nl_limit)
 762                                 goto nla_put_failure;
 763                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 764                                         c->limits[j].max))
 765                                 goto nla_put_failure;
 766                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 767                                                 c->limits[j].types))
 768                                 goto nla_put_failure;
 769                         nla_nest_end(msg, nl_limit);
 770                 }
 771
 772                 nla_nest_end(msg, nl_limits);
 773
 774                 if (c->beacon_int_infra_match &&
 775                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 776                         goto nla_put_failure;
 777                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 778                                 c->num_different_channels) ||
 779                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 780                                 c->max_interfaces))
 781                         goto nla_put_failure;
 782
 783                 nla_nest_end(msg, nl_combi);
 784         }
 785
 786         nla_nest_end(msg, nl_combis);
 787
 788         return 0;
 789 nla_put_failure:
 790         return -ENOBUFS;
 791 }
 792
 793 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 794                               struct cfg80211_registered_device *dev)
 795 {
 796         void *hdr;
 797         struct nlattr *nl_bands, *nl_band;
 798         struct nlattr *nl_freqs, *nl_freq;
 799         struct nlattr *nl_rates, *nl_rate;
 800         struct nlattr *nl_cmds;
 801         enum ieee80211_band band;
 802         struct ieee80211_channel *chan;
 803         struct ieee80211_rate *rate;
 804         int i;
 805         const struct ieee80211_txrx_stypes *mgmt_stypes =
 806                                 dev->wiphy.mgmt_stypes;
 807
 808         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 809         if (!hdr)
 810                 return -1;
 811
 812         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 813             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 814             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 815                         cfg80211_rdev_list_generation) ||
 816             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 817                        dev->wiphy.retry_short) ||
 818             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 819                        dev->wiphy.retry_long) ||
 820             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 821                         dev->wiphy.frag_threshold) ||
 822             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 823                         dev->wiphy.rts_threshold) ||
 824             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 825                        dev->wiphy.coverage_class) ||
 826             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 827                        dev->wiphy.max_scan_ssids) ||
 828             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 829                        dev->wiphy.max_sched_scan_ssids) ||
 830             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 831                         dev->wiphy.max_scan_ie_len) ||
 832             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 833                         dev->wiphy.max_sched_scan_ie_len) ||
 834             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 835                        dev->wiphy.max_match_sets))
 836                 goto nla_put_failure;
 837
 838         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 839             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 840                 goto nla_put_failure;
 841         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 842             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 843                 goto nla_put_failure;
 844         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 845             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 846                 goto nla_put_failure;
 847         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 848             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 849                 goto nla_put_failure;
 850         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 851             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 852                 goto nla_put_failure;
 853         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 854             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 855                 goto nla_put_failure;
 856
 857         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 858                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 859                     dev->wiphy.cipher_suites))
 860                 goto nla_put_failure;
 861
 862         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 863                        dev->wiphy.max_num_pmkids))
 864                 goto nla_put_failure;
 865
 866         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 867             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 868                 goto nla_put_failure;
 869
 870         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 871                         dev->wiphy.available_antennas_tx) ||
 872             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 873                         dev->wiphy.available_antennas_rx))
 874                 goto nla_put_failure;
 875
 876         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 877             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 878                         dev->wiphy.probe_resp_offload))
 879                 goto nla_put_failure;
 880
 881         if ((dev->wiphy.available_antennas_tx ||
 882              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 883                 u32 tx_ant = 0, rx_ant = 0;
 884                 int res;
 885                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 886                 if (!res) {
 887                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 888                                         tx_ant) ||
 889                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 890                                         rx_ant))
 891                                 goto nla_put_failure;
 892                 }
 893         }
 894
 895         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 896                                 dev->wiphy.interface_modes))
 897                 goto nla_put_failure;
 898
 899         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 900         if (!nl_bands)
 901                 goto nla_put_failure;
 902
 903         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 904                 if (!dev->wiphy.bands[band])
 905                         continue;
 906
 907                 nl_band = nla_nest_start(msg, band);
 908                 if (!nl_band)
 909                         goto nla_put_failure;
 910
 911                 /* add HT info */
 912                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 913                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 914                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 915                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 916                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 917                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 918                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 919                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 920                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 921                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 922                         goto nla_put_failure;
 923
 924                 /* add frequencies */
 925                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 926                 if (!nl_freqs)
 927                         goto nla_put_failure;
 928
 929                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 930                         nl_freq = nla_nest_start(msg, i);
 931                         if (!nl_freq)
 932                                 goto nla_put_failure;
 933
 934                         chan = &dev->wiphy.bands[band]->channels[i];
 935
 936                         if (nl80211_msg_put_channel(msg, chan))
 937                                 goto nla_put_failure;
 938
 939                         nla_nest_end(msg, nl_freq);
 940                 }
 941
 942                 nla_nest_end(msg, nl_freqs);
 943
 944                 /* add bitrates */
 945                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 946                 if (!nl_rates)
 947                         goto nla_put_failure;
 948
 949                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 950                         nl_rate = nla_nest_start(msg, i);
 951                         if (!nl_rate)
 952                                 goto nla_put_failure;
 953
 954                         rate = &dev->wiphy.bands[band]->bitrates[i];
 955                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 956                                         rate->bitrate))
 957                                 goto nla_put_failure;
 958                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 959                             nla_put_flag(msg,
 960                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 961                                 goto nla_put_failure;
 962
 963                         nla_nest_end(msg, nl_rate);
 964                 }
 965
 966                 nla_nest_end(msg, nl_rates);
 967
 968                 nla_nest_end(msg, nl_band);
 969         }
 970         nla_nest_end(msg, nl_bands);
 971
 972         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 973         if (!nl_cmds)
 974                 goto nla_put_failure;
 975
 976         i = 0;
 977 #define CMD(op, n)                                              \
 978          do {                                                   \
 979                 if (dev->ops->op) {                             \
 980                         i++;                                    \
 981                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 982                                 goto nla_put_failure;           \
 983                 }                                               \
 984         } while (0)
 985
 986         CMD(add_virtual_intf, NEW_INTERFACE);
 987         CMD(change_virtual_intf, SET_INTERFACE);
 988         CMD(add_key, NEW_KEY);
 989         CMD(start_ap, START_AP);
 990         CMD(add_station, NEW_STATION);
 991         CMD(add_mpath, NEW_MPATH);
 992         CMD(update_mesh_config, SET_MESH_CONFIG);
 993         CMD(change_bss, SET_BSS);
 994         CMD(auth, AUTHENTICATE);
 995         CMD(assoc, ASSOCIATE);
 996         CMD(deauth, DEAUTHENTICATE);
 997         CMD(disassoc, DISASSOCIATE);
 998         CMD(join_ibss, JOIN_IBSS);
 999         CMD(join_mesh, JOIN_MESH);
1000         CMD(set_pmksa, SET_PMKSA);
1001         CMD(del_pmksa, DEL_PMKSA);
1002         CMD(flush_pmksa, FLUSH_PMKSA);
1003         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1004                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1005         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1006         CMD(mgmt_tx, FRAME);
1007         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1008         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1009                 i++;
1010                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1011                         goto nla_put_failure;
1012         }
1013         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1014             dev->ops->join_mesh) {
1015                 i++;
1016                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1017                         goto nla_put_failure;
1018         }
1019         CMD(set_wds_peer, SET_WDS_PEER);
1020         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1021                 CMD(tdls_mgmt, TDLS_MGMT);
1022                 CMD(tdls_oper, TDLS_OPER);
1023         }
1024         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1025                 CMD(sched_scan_start, START_SCHED_SCAN);
1026         CMD(probe_client, PROBE_CLIENT);
1027         CMD(set_noack_map, SET_NOACK_MAP);
1028         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1029                 i++;
1030                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1031                         goto nla_put_failure;
1032         }
1033
1034 #ifdef CONFIG_NL80211_TESTMODE
1035         CMD(testmode_cmd, TESTMODE);
1036 #endif
1037
1038 #undef CMD
1039
1040         if (dev->ops->connect || dev->ops->auth) {
1041                 i++;
1042                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1043                         goto nla_put_failure;
1044         }
1045
1046         if (dev->ops->disconnect || dev->ops->deauth) {
1047                 i++;
1048                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1049                         goto nla_put_failure;
1050         }
1051
1052         nla_nest_end(msg, nl_cmds);
1053
1054         if (dev->ops->remain_on_channel &&
1055             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1056             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1057                         dev->wiphy.max_remain_on_channel_duration))
1058                 goto nla_put_failure;
1059
1060         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1061             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1062                 goto nla_put_failure;
1063
1064         if (mgmt_stypes) {
1065                 u16 stypes;
1066                 struct nlattr *nl_ftypes, *nl_ifs;
1067                 enum nl80211_iftype ift;
1068
1069                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1070                 if (!nl_ifs)
1071                         goto nla_put_failure;
1072
1073                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1074                         nl_ftypes = nla_nest_start(msg, ift);
1075                         if (!nl_ftypes)
1076                                 goto nla_put_failure;
1077                         i = 0;
1078                         stypes = mgmt_stypes[ift].tx;
1079                         while (stypes) {
1080                                 if ((stypes & 1) &&
1081                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1082                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1083                                         goto nla_put_failure;
1084                                 stypes >>= 1;
1085                                 i++;
1086                         }
1087                         nla_nest_end(msg, nl_ftypes);
1088                 }
1089
1090                 nla_nest_end(msg, nl_ifs);
1091
1092                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1093                 if (!nl_ifs)
1094                         goto nla_put_failure;
1095
1096                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1097                         nl_ftypes = nla_nest_start(msg, ift);
1098                         if (!nl_ftypes)
1099                                 goto nla_put_failure;
1100                         i = 0;
1101                         stypes = mgmt_stypes[ift].rx;
1102                         while (stypes) {
1103                                 if ((stypes & 1) &&
1104                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1105                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1106                                         goto nla_put_failure;
1107                                 stypes >>= 1;
1108                                 i++;
1109                         }
1110                         nla_nest_end(msg, nl_ftypes);
1111                 }
1112                 nla_nest_end(msg, nl_ifs);
1113         }
1114
1115         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1116                 struct nlattr *nl_wowlan;
1117
1118                 nl_wowlan = nla_nest_start(msg,
1119                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1120                 if (!nl_wowlan)
1121                         goto nla_put_failure;
1122
1123                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1124                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1125                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1126                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1127                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1128                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1129                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1130                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1131                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1132                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1133                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1134                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1135                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1136                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1137                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1138                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1139                     goto nla_put_failure;
1140                 if (dev->wiphy.wowlan.n_patterns) {
1141                         struct nl80211_wowlan_pattern_support pat = {
1142                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1143                                 .min_pattern_len =
1144                                         dev->wiphy.wowlan.pattern_min_len,
1145                                 .max_pattern_len =
1146                                         dev->wiphy.wowlan.pattern_max_len,
1147                         };
1148                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1149                                     sizeof(pat), &pat))
1150                                 goto nla_put_failure;
1151                 }
1152
1153                 nla_nest_end(msg, nl_wowlan);
1154         }
1155
1156         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1157                                 dev->wiphy.software_iftypes))
1158                 goto nla_put_failure;
1159
1160         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1161                 goto nla_put_failure;
1162
1163         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1164             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1165                         dev->wiphy.ap_sme_capa))
1166                 goto nla_put_failure;
1167
1168         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1169                         dev->wiphy.features))
1170                 goto nla_put_failure;
1171
1172         if (dev->wiphy.ht_capa_mod_mask &&
1173             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1174                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1175                     dev->wiphy.ht_capa_mod_mask))
1176                 goto nla_put_failure;
1177
1178         return genlmsg_end(msg, hdr);
1179
1180  nla_put_failure:
1181         genlmsg_cancel(msg, hdr);
1182         return -EMSGSIZE;
1183 }
1184
1185 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1186 {
1187         int idx = 0;
1188         int start = cb->args[0];
1189         struct cfg80211_registered_device *dev;
1190
1191         mutex_lock(&cfg80211_mutex);
1192         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1193                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1194                         continue;
1195                 if (++idx <= start)
1196                         continue;
1197                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1198                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1199                                        dev) < 0) {
1200                         idx--;
1201                         break;
1202                 }
1203         }
1204         mutex_unlock(&cfg80211_mutex);
1205
1206         cb->args[0] = idx;
1207
1208         return skb->len;
1209 }
1210
1211 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1212 {
1213         struct sk_buff *msg;
1214         struct cfg80211_registered_device *dev = info->user_ptr[0];
1215
1216         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1217         if (!msg)
1218                 return -ENOMEM;
1219
1220         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1221                 nlmsg_free(msg);
1222                 return -ENOBUFS;
1223         }
1224
1225         return genlmsg_reply(msg, info);
1226 }
1227
1228 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1229         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1230         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1231         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1232         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1233         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1234 };
1235
1236 static int parse_txq_params(struct nlattr *tb[],
1237                             struct ieee80211_txq_params *txq_params)
1238 {
1239         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1240             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1241             !tb[NL80211_TXQ_ATTR_AIFS])
1242                 return -EINVAL;
1243
1244         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1245         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1246         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1247         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1248         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1249
1250         if (txq_params->ac >= NL80211_NUM_ACS)
1251                 return -EINVAL;
1252
1253         return 0;
1254 }
1255
1256 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1257 {
1258         /*
1259          * You can only set the channel explicitly for WDS interfaces,
1260          * all others have their channel managed via their respective
1261          * "establish a connection" command (connect, join, ...)
1262          *
1263          * For AP/GO and mesh mode, the channel can be set with the
1264          * channel userspace API, but is only stored and passed to the
1265          * low-level driver when the AP starts or the mesh is joined.
1266          * This is for backward compatibility, userspace can also give
1267          * the channel in the start-ap or join-mesh commands instead.
1268          *
1269          * Monitors are special as they are normally slaved to
1270          * whatever else is going on, so they have their own special
1271          * operation to set the monitor channel if possible.
1272          */
1273         return !wdev ||
1274                 wdev->iftype == NL80211_IFTYPE_AP ||
1275                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1276                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1277                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1278 }
1279
1280 static bool nl80211_valid_channel_type(struct genl_info *info,
1281                                        enum nl80211_channel_type *channel_type)
1282 {
1283         enum nl80211_channel_type tmp;
1284
1285         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1286                 return false;
1287
1288         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1289         if (tmp != NL80211_CHAN_NO_HT &&
1290             tmp != NL80211_CHAN_HT20 &&
1291             tmp != NL80211_CHAN_HT40PLUS &&
1292             tmp != NL80211_CHAN_HT40MINUS)
1293                 return false;
1294
1295         if (channel_type)
1296                 *channel_type = tmp;
1297
1298         return true;
1299 }
1300
1301 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1302                                  struct wireless_dev *wdev,
1303                                  struct genl_info *info)
1304 {
1305         struct ieee80211_channel *channel;
1306         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1307         u32 freq;
1308         int result;
1309         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1310
1311         if (wdev)
1312                 iftype = wdev->iftype;
1313
1314         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1315                 return -EINVAL;
1316
1317         if (!nl80211_can_set_dev_channel(wdev))
1318                 return -EOPNOTSUPP;
1319
1320         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1321             !nl80211_valid_channel_type(info, &channel_type))
1322                 return -EINVAL;
1323
1324         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1325
1326         mutex_lock(&rdev->devlist_mtx);
1327         switch (iftype) {
1328         case NL80211_IFTYPE_AP:
1329         case NL80211_IFTYPE_P2P_GO:
1330                 if (wdev->beacon_interval) {
1331                         result = -EBUSY;
1332                         break;
1333                 }
1334                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1335                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1336                                                               channel,
1337                                                               channel_type)) {
1338                         result = -EINVAL;
1339                         break;
1340                 }
1341                 wdev->preset_chan = channel;
1342                 wdev->preset_chantype = channel_type;
1343                 result = 0;
1344                 break;
1345         case NL80211_IFTYPE_MESH_POINT:
1346                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1347                 break;
1348         case NL80211_IFTYPE_MONITOR:
1349                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1350                 break;
1351         default:
1352                 result = -EINVAL;
1353         }
1354         mutex_unlock(&rdev->devlist_mtx);
1355
1356         return result;
1357 }
1358
1359 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1360 {
1361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1362         struct net_device *netdev = info->user_ptr[1];
1363
1364         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1365 }
1366
1367 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1368 {
1369         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1370         struct net_device *dev = info->user_ptr[1];
1371         struct wireless_dev *wdev = dev->ieee80211_ptr;
1372         const u8 *bssid;
1373
1374         if (!info->attrs[NL80211_ATTR_MAC])
1375                 return -EINVAL;
1376
1377         if (netif_running(dev))
1378                 return -EBUSY;
1379
1380         if (!rdev->ops->set_wds_peer)
1381                 return -EOPNOTSUPP;
1382
1383         if (wdev->iftype != NL80211_IFTYPE_WDS)
1384                 return -EOPNOTSUPP;
1385
1386         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1387         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1388 }
1389
1390
1391 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1392 {
1393         struct cfg80211_registered_device *rdev;
1394         struct net_device *netdev = NULL;
1395         struct wireless_dev *wdev;
1396         int result = 0, rem_txq_params = 0;
1397         struct nlattr *nl_txq_params;
1398         u32 changed;
1399         u8 retry_short = 0, retry_long = 0;
1400         u32 frag_threshold = 0, rts_threshold = 0;
1401         u8 coverage_class = 0;
1402
1403         /*
1404          * Try to find the wiphy and netdev. Normally this
1405          * function shouldn't need the netdev, but this is
1406          * done for backward compatibility -- previously
1407          * setting the channel was done per wiphy, but now
1408          * it is per netdev. Previous userland like hostapd
1409          * also passed a netdev to set_wiphy, so that it is
1410          * possible to let that go to the right netdev!
1411          */
1412         mutex_lock(&cfg80211_mutex);
1413
1414         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1415                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1416
1417                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1418                 if (netdev && netdev->ieee80211_ptr) {
1419                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1420                         mutex_lock(&rdev->mtx);
1421                 } else
1422                         netdev = NULL;
1423         }
1424
1425         if (!netdev) {
1426                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1427                                                   info->attrs);
1428                 if (IS_ERR(rdev)) {
1429                         mutex_unlock(&cfg80211_mutex);
1430                         return PTR_ERR(rdev);
1431                 }
1432                 wdev = NULL;
1433                 netdev = NULL;
1434                 result = 0;
1435
1436                 mutex_lock(&rdev->mtx);
1437         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1438                 wdev = netdev->ieee80211_ptr;
1439         else
1440                 wdev = NULL;
1441
1442         /*
1443          * end workaround code, by now the rdev is available
1444          * and locked, and wdev may or may not be NULL.
1445          */
1446
1447         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1448                 result = cfg80211_dev_rename(
1449                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1450
1451         mutex_unlock(&cfg80211_mutex);
1452
1453         if (result)
1454                 goto bad_res;
1455
1456         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1457                 struct ieee80211_txq_params txq_params;
1458                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1459
1460                 if (!rdev->ops->set_txq_params) {
1461                         result = -EOPNOTSUPP;
1462                         goto bad_res;
1463                 }
1464
1465                 if (!netdev) {
1466                         result = -EINVAL;
1467                         goto bad_res;
1468                 }
1469
1470                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1471                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1472                         result = -EINVAL;
1473                         goto bad_res;
1474                 }
1475
1476                 if (!netif_running(netdev)) {
1477                         result = -ENETDOWN;
1478                         goto bad_res;
1479                 }
1480
1481                 nla_for_each_nested(nl_txq_params,
1482                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1483                                     rem_txq_params) {
1484                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1485                                   nla_data(nl_txq_params),
1486                                   nla_len(nl_txq_params),
1487                                   txq_params_policy);
1488                         result = parse_txq_params(tb, &txq_params);
1489                         if (result)
1490                                 goto bad_res;
1491
1492                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1493                                                            netdev,
1494                                                            &txq_params);
1495                         if (result)
1496                                 goto bad_res;
1497                 }
1498         }
1499
1500         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1501                 result = __nl80211_set_channel(rdev, wdev, info);
1502                 if (result)
1503                         goto bad_res;
1504         }
1505
1506         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1507                 enum nl80211_tx_power_setting type;
1508                 int idx, mbm = 0;
1509
1510                 if (!rdev->ops->set_tx_power) {
1511                         result = -EOPNOTSUPP;
1512                         goto bad_res;
1513                 }
1514
1515                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1516                 type = nla_get_u32(info->attrs[idx]);
1517
1518                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1519                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1520                         result = -EINVAL;
1521                         goto bad_res;
1522                 }
1523
1524                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1525                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1526                         mbm = nla_get_u32(info->attrs[idx]);
1527                 }
1528
1529                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1530                 if (result)
1531                         goto bad_res;
1532         }
1533
1534         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1535             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1536                 u32 tx_ant, rx_ant;
1537                 if ((!rdev->wiphy.available_antennas_tx &&
1538                      !rdev->wiphy.available_antennas_rx) ||
1539                     !rdev->ops->set_antenna) {
1540                         result = -EOPNOTSUPP;
1541                         goto bad_res;
1542                 }
1543
1544                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1545                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1546
1547                 /* reject antenna configurations which don't match the
1548                  * available antenna masks, except for the "all" mask */
1549                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1550                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1551                         result = -EINVAL;
1552                         goto bad_res;
1553                 }
1554
1555                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1556                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1557
1558                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1559                 if (result)
1560                         goto bad_res;
1561         }
1562
1563         changed = 0;
1564
1565         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1566                 retry_short = nla_get_u8(
1567                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1568                 if (retry_short == 0) {
1569                         result = -EINVAL;
1570                         goto bad_res;
1571                 }
1572                 changed |= WIPHY_PARAM_RETRY_SHORT;
1573         }
1574
1575         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1576                 retry_long = nla_get_u8(
1577                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1578                 if (retry_long == 0) {
1579                         result = -EINVAL;
1580                         goto bad_res;
1581                 }
1582                 changed |= WIPHY_PARAM_RETRY_LONG;
1583         }
1584
1585         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1586                 frag_threshold = nla_get_u32(
1587                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1588                 if (frag_threshold < 256) {
1589                         result = -EINVAL;
1590                         goto bad_res;
1591                 }
1592                 if (frag_threshold != (u32) -1) {
1593                         /*
1594                          * Fragments (apart from the last one) are required to
1595                          * have even length. Make the fragmentation code
1596                          * simpler by stripping LSB should someone try to use
1597                          * odd threshold value.
1598                          */
1599                         frag_threshold &= ~0x1;
1600                 }
1601                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1602         }
1603
1604         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1605                 rts_threshold = nla_get_u32(
1606                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1607                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1608         }
1609
1610         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1611                 coverage_class = nla_get_u8(
1612                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1613                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1614         }
1615
1616         if (changed) {
1617                 u8 old_retry_short, old_retry_long;
1618                 u32 old_frag_threshold, old_rts_threshold;
1619                 u8 old_coverage_class;
1620
1621                 if (!rdev->ops->set_wiphy_params) {
1622                         result = -EOPNOTSUPP;
1623                         goto bad_res;
1624                 }
1625
1626                 old_retry_short = rdev->wiphy.retry_short;
1627                 old_retry_long = rdev->wiphy.retry_long;
1628                 old_frag_threshold = rdev->wiphy.frag_threshold;
1629                 old_rts_threshold = rdev->wiphy.rts_threshold;
1630                 old_coverage_class = rdev->wiphy.coverage_class;
1631
1632                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1633                         rdev->wiphy.retry_short = retry_short;
1634                 if (changed & WIPHY_PARAM_RETRY_LONG)
1635                         rdev->wiphy.retry_long = retry_long;
1636                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1637                         rdev->wiphy.frag_threshold = frag_threshold;
1638                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1639                         rdev->wiphy.rts_threshold = rts_threshold;
1640                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1641                         rdev->wiphy.coverage_class = coverage_class;
1642
1643                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1644                 if (result) {
1645                         rdev->wiphy.retry_short = old_retry_short;
1646                         rdev->wiphy.retry_long = old_retry_long;
1647                         rdev->wiphy.frag_threshold = old_frag_threshold;
1648                         rdev->wiphy.rts_threshold = old_rts_threshold;
1649                         rdev->wiphy.coverage_class = old_coverage_class;
1650                 }
1651         }
1652
1653  bad_res:
1654         mutex_unlock(&rdev->mtx);
1655         if (netdev)
1656                 dev_put(netdev);
1657         return result;
1658 }
1659
1660
1661 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1662                               struct cfg80211_registered_device *rdev,
1663                               struct net_device *dev)
1664 {
1665         void *hdr;
1666
1667         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1668         if (!hdr)
1669                 return -1;
1670
1671         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1672             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1673             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1674             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1675                         dev->ieee80211_ptr->iftype) ||
1676             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1677                         rdev->devlist_generation ^
1678                         (cfg80211_rdev_list_generation << 2)))
1679                 goto nla_put_failure;
1680
1681         if (rdev->ops->get_channel) {
1682                 struct ieee80211_channel *chan;
1683                 enum nl80211_channel_type channel_type;
1684
1685                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1686                 if (chan &&
1687                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1688                                     chan->center_freq) ||
1689                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1690                                     channel_type)))
1691                         goto nla_put_failure;
1692         }
1693
1694         return genlmsg_end(msg, hdr);
1695
1696  nla_put_failure:
1697         genlmsg_cancel(msg, hdr);
1698         return -EMSGSIZE;
1699 }
1700
1701 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1702 {
1703         int wp_idx = 0;
1704         int if_idx = 0;
1705         int wp_start = cb->args[0];
1706         int if_start = cb->args[1];
1707         struct cfg80211_registered_device *rdev;
1708         struct wireless_dev *wdev;
1709
1710         mutex_lock(&cfg80211_mutex);
1711         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1712                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1713                         continue;
1714                 if (wp_idx < wp_start) {
1715                         wp_idx++;
1716                         continue;
1717                 }
1718                 if_idx = 0;
1719
1720                 mutex_lock(&rdev->devlist_mtx);
1721                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1722                         if (if_idx < if_start) {
1723                                 if_idx++;
1724                                 continue;
1725                         }
1726                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1727                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1728                                                rdev, wdev->netdev) < 0) {
1729                                 mutex_unlock(&rdev->devlist_mtx);
1730                                 goto out;
1731                         }
1732                         if_idx++;
1733                 }
1734                 mutex_unlock(&rdev->devlist_mtx);
1735
1736                 wp_idx++;
1737         }
1738  out:
1739         mutex_unlock(&cfg80211_mutex);
1740
1741         cb->args[0] = wp_idx;
1742         cb->args[1] = if_idx;
1743
1744         return skb->len;
1745 }
1746
1747 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1748 {
1749         struct sk_buff *msg;
1750         struct cfg80211_registered_device *dev = info->user_ptr[0];
1751         struct net_device *netdev = info->user_ptr[1];
1752
1753         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1754         if (!msg)
1755                 return -ENOMEM;
1756
1757         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1758                                dev, netdev) < 0) {
1759                 nlmsg_free(msg);
1760                 return -ENOBUFS;
1761         }
1762
1763         return genlmsg_reply(msg, info);
1764 }
1765
1766 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1767         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1768         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1769         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1770         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1771         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1772 };
1773
1774 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1775 {
1776         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1777         int flag;
1778
1779         *mntrflags = 0;
1780
1781         if (!nla)
1782                 return -EINVAL;
1783
1784         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1785                              nla, mntr_flags_policy))
1786                 return -EINVAL;
1787
1788         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1789                 if (flags[flag])
1790                         *mntrflags |= (1<<flag);
1791
1792         return 0;
1793 }
1794
1795 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1796                                struct net_device *netdev, u8 use_4addr,
1797                                enum nl80211_iftype iftype)
1798 {
1799         if (!use_4addr) {
1800                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1801                         return -EBUSY;
1802                 return 0;
1803         }
1804
1805         switch (iftype) {
1806         case NL80211_IFTYPE_AP_VLAN:
1807                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1808                         return 0;
1809                 break;
1810         case NL80211_IFTYPE_STATION:
1811                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1812                         return 0;
1813                 break;
1814         default:
1815                 break;
1816         }
1817
1818         return -EOPNOTSUPP;
1819 }
1820
1821 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1822 {
1823         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1824         struct vif_params params;
1825         int err;
1826         enum nl80211_iftype otype, ntype;
1827         struct net_device *dev = info->user_ptr[1];
1828         u32 _flags, *flags = NULL;
1829         bool change = false;
1830
1831         memset(&params, 0, sizeof(params));
1832
1833         otype = ntype = dev->ieee80211_ptr->iftype;
1834
1835         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1836                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1837                 if (otype != ntype)
1838                         change = true;
1839                 if (ntype > NL80211_IFTYPE_MAX)
1840                         return -EINVAL;
1841         }
1842
1843         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1844                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1845
1846                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1847                         return -EINVAL;
1848                 if (netif_running(dev))
1849                         return -EBUSY;
1850
1851                 wdev_lock(wdev);
1852                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1853                              IEEE80211_MAX_MESH_ID_LEN);
1854                 wdev->mesh_id_up_len =
1855                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1856                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1857                        wdev->mesh_id_up_len);
1858                 wdev_unlock(wdev);
1859         }
1860
1861         if (info->attrs[NL80211_ATTR_4ADDR]) {
1862                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1863                 change = true;
1864                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1865                 if (err)
1866                         return err;
1867         } else {
1868                 params.use_4addr = -1;
1869         }
1870
1871         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1872                 if (ntype != NL80211_IFTYPE_MONITOR)
1873                         return -EINVAL;
1874                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1875                                           &_flags);
1876                 if (err)
1877                         return err;
1878
1879                 flags = &_flags;
1880                 change = true;
1881         }
1882
1883         if (change)
1884                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1885         else
1886                 err = 0;
1887
1888         if (!err && params.use_4addr != -1)
1889                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1890
1891         return err;
1892 }
1893
1894 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1895 {
1896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1897         struct vif_params params;
1898         struct net_device *dev;
1899         int err;
1900         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1901         u32 flags;
1902
1903         memset(&params, 0, sizeof(params));
1904
1905         if (!info->attrs[NL80211_ATTR_IFNAME])
1906                 return -EINVAL;
1907
1908         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1909                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1910                 if (type > NL80211_IFTYPE_MAX)
1911                         return -EINVAL;
1912         }
1913
1914         if (!rdev->ops->add_virtual_intf ||
1915             !(rdev->wiphy.interface_modes & (1 << type)))
1916                 return -EOPNOTSUPP;
1917
1918         if (info->attrs[NL80211_ATTR_4ADDR]) {
1919                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1920                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1921                 if (err)
1922                         return err;
1923         }
1924
1925         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1926                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1927                                   &flags);
1928         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1929                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1930                 type, err ? NULL : &flags, &params);
1931         if (IS_ERR(dev))
1932                 return PTR_ERR(dev);
1933
1934         if (type == NL80211_IFTYPE_MESH_POINT &&
1935             info->attrs[NL80211_ATTR_MESH_ID]) {
1936                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1937
1938                 wdev_lock(wdev);
1939                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1940                              IEEE80211_MAX_MESH_ID_LEN);
1941                 wdev->mesh_id_up_len =
1942                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1943                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1944                        wdev->mesh_id_up_len);
1945                 wdev_unlock(wdev);
1946         }
1947
1948         return 0;
1949 }
1950
1951 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1952 {
1953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1954         struct net_device *dev = info->user_ptr[1];
1955
1956         if (!rdev->ops->del_virtual_intf)
1957                 return -EOPNOTSUPP;
1958
1959         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1960 }
1961
1962 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1963 {
1964         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1965         struct net_device *dev = info->user_ptr[1];
1966         u16 noack_map;
1967
1968         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1969                 return -EINVAL;
1970
1971         if (!rdev->ops->set_noack_map)
1972                 return -EOPNOTSUPP;
1973
1974         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1975
1976         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1977 }
1978
1979 struct get_key_cookie {
1980         struct sk_buff *msg;
1981         int error;
1982         int idx;
1983 };
1984
1985 static void get_key_callback(void *c, struct key_params *params)
1986 {
1987         struct nlattr *key;
1988         struct get_key_cookie *cookie = c;
1989
1990         if ((params->key &&
1991              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1992                      params->key_len, params->key)) ||
1993             (params->seq &&
1994              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1995                      params->seq_len, params->seq)) ||
1996             (params->cipher &&
1997              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1998                          params->cipher)))
1999                 goto nla_put_failure;
2000
2001         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2002         if (!key)
2003                 goto nla_put_failure;
2004
2005         if ((params->key &&
2006              nla_put(cookie->msg, NL80211_KEY_DATA,
2007                      params->key_len, params->key)) ||
2008             (params->seq &&
2009              nla_put(cookie->msg, NL80211_KEY_SEQ,
2010                      params->seq_len, params->seq)) ||
2011             (params->cipher &&
2012              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2013                          params->cipher)))
2014                 goto nla_put_failure;
2015
2016         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2017                 goto nla_put_failure;
2018
2019         nla_nest_end(cookie->msg, key);
2020
2021         return;
2022  nla_put_failure:
2023         cookie->error = 1;
2024 }
2025
2026 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2027 {
2028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2029         int err;
2030         struct net_device *dev = info->user_ptr[1];
2031         u8 key_idx = 0;
2032         const u8 *mac_addr = NULL;
2033         bool pairwise;
2034         struct get_key_cookie cookie = {
2035                 .error = 0,
2036         };
2037         void *hdr;
2038         struct sk_buff *msg;
2039
2040         if (info->attrs[NL80211_ATTR_KEY_IDX])
2041                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2042
2043         if (key_idx > 5)
2044                 return -EINVAL;
2045
2046         if (info->attrs[NL80211_ATTR_MAC])
2047                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2048
2049         pairwise = !!mac_addr;
2050         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2051                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2052                 if (kt >= NUM_NL80211_KEYTYPES)
2053                         return -EINVAL;
2054                 if (kt != NL80211_KEYTYPE_GROUP &&
2055                     kt != NL80211_KEYTYPE_PAIRWISE)
2056                         return -EINVAL;
2057                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2058         }
2059
2060         if (!rdev->ops->get_key)
2061                 return -EOPNOTSUPP;
2062
2063         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2064         if (!msg)
2065                 return -ENOMEM;
2066
2067         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2068                              NL80211_CMD_NEW_KEY);
2069         if (IS_ERR(hdr))
2070                 return PTR_ERR(hdr);
2071
2072         cookie.msg = msg;
2073         cookie.idx = key_idx;
2074
2075         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2076             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2077                 goto nla_put_failure;
2078         if (mac_addr &&
2079             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2080                 goto nla_put_failure;
2081
2082         if (pairwise && mac_addr &&
2083             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2084                 return -ENOENT;
2085
2086         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2087                                  mac_addr, &cookie, get_key_callback);
2088
2089         if (err)
2090                 goto free_msg;
2091
2092         if (cookie.error)
2093                 goto nla_put_failure;
2094
2095         genlmsg_end(msg, hdr);
2096         return genlmsg_reply(msg, info);
2097
2098  nla_put_failure:
2099         err = -ENOBUFS;
2100  free_msg:
2101         nlmsg_free(msg);
2102         return err;
2103 }
2104
2105 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2106 {
2107         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2108         struct key_parse key;
2109         int err;
2110         struct net_device *dev = info->user_ptr[1];
2111
2112         err = nl80211_parse_key(info, &key);
2113         if (err)
2114                 return err;
2115
2116         if (key.idx < 0)
2117                 return -EINVAL;
2118
2119         /* only support setting default key */
2120         if (!key.def && !key.defmgmt)
2121                 return -EINVAL;
2122
2123         wdev_lock(dev->ieee80211_ptr);
2124
2125         if (key.def) {
2126                 if (!rdev->ops->set_default_key) {
2127                         err = -EOPNOTSUPP;
2128                         goto out;
2129                 }
2130
2131                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2132                 if (err)
2133                         goto out;
2134
2135                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2136                                                  key.def_uni, key.def_multi);
2137
2138                 if (err)
2139                         goto out;
2140
2141 #ifdef CONFIG_CFG80211_WEXT
2142                 dev->ieee80211_ptr->wext.default_key = key.idx;
2143 #endif
2144         } else {
2145                 if (key.def_uni || !key.def_multi) {
2146                         err = -EINVAL;
2147                         goto out;
2148                 }
2149
2150                 if (!rdev->ops->set_default_mgmt_key) {
2151                         err = -EOPNOTSUPP;
2152                         goto out;
2153                 }
2154
2155                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2156                 if (err)
2157                         goto out;
2158
2159                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2160                                                       dev, key.idx);
2161                 if (err)
2162                         goto out;
2163
2164 #ifdef CONFIG_CFG80211_WEXT
2165                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2166 #endif
2167         }
2168
2169  out:
2170         wdev_unlock(dev->ieee80211_ptr);
2171
2172         return err;
2173 }
2174
2175 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2176 {
2177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2178         int err;
2179         struct net_device *dev = info->user_ptr[1];
2180         struct key_parse key;
2181         const u8 *mac_addr = NULL;
2182
2183         err = nl80211_parse_key(info, &key);
2184         if (err)
2185                 return err;
2186
2187         if (!key.p.key)
2188                 return -EINVAL;
2189
2190         if (info->attrs[NL80211_ATTR_MAC])
2191                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2192
2193         if (key.type == -1) {
2194                 if (mac_addr)
2195                         key.type = NL80211_KEYTYPE_PAIRWISE;
2196                 else
2197                         key.type = NL80211_KEYTYPE_GROUP;
2198         }
2199
2200         /* for now */
2201         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2202             key.type != NL80211_KEYTYPE_GROUP)
2203                 return -EINVAL;
2204
2205         if (!rdev->ops->add_key)
2206                 return -EOPNOTSUPP;
2207
2208         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2209                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2210                                            mac_addr))
2211                 return -EINVAL;
2212
2213         wdev_lock(dev->ieee80211_ptr);
2214         err = nl80211_key_allowed(dev->ieee80211_ptr);
2215         if (!err)
2216                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2217                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2218                                          mac_addr, &key.p);
2219         wdev_unlock(dev->ieee80211_ptr);
2220
2221         return err;
2222 }
2223
2224 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2225 {
2226         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2227         int err;
2228         struct net_device *dev = info->user_ptr[1];
2229         u8 *mac_addr = NULL;
2230         struct key_parse key;
2231
2232         err = nl80211_parse_key(info, &key);
2233         if (err)
2234                 return err;
2235
2236         if (info->attrs[NL80211_ATTR_MAC])
2237                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2238
2239         if (key.type == -1) {
2240                 if (mac_addr)
2241                         key.type = NL80211_KEYTYPE_PAIRWISE;
2242                 else
2243                         key.type = NL80211_KEYTYPE_GROUP;
2244         }
2245
2246         /* for now */
2247         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2248             key.type != NL80211_KEYTYPE_GROUP)
2249                 return -EINVAL;
2250
2251         if (!rdev->ops->del_key)
2252                 return -EOPNOTSUPP;
2253
2254         wdev_lock(dev->ieee80211_ptr);
2255         err = nl80211_key_allowed(dev->ieee80211_ptr);
2256
2257         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2258             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2259                 err = -ENOENT;
2260
2261         if (!err)
2262                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2263                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2264                                          mac_addr);
2265
2266 #ifdef CONFIG_CFG80211_WEXT
2267         if (!err) {
2268                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2269                         dev->ieee80211_ptr->wext.default_key = -1;
2270                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2271                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2272         }
2273 #endif
2274         wdev_unlock(dev->ieee80211_ptr);
2275
2276         return err;
2277 }
2278
2279 static int nl80211_parse_beacon(struct genl_info *info,
2280                                 struct cfg80211_beacon_data *bcn)
2281 {
2282         bool haveinfo = false;
2283
2284         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2285             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2286             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2287             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2288                 return -EINVAL;
2289
2290         memset(bcn, 0, sizeof(*bcn));
2291
2292         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2293                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2294                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2295                 if (!bcn->head_len)
2296                         return -EINVAL;
2297                 haveinfo = true;
2298         }
2299
2300         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2301                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2302                 bcn->tail_len =
2303                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2304                 haveinfo = true;
2305         }
2306
2307         if (!haveinfo)
2308                 return -EINVAL;
2309
2310         if (info->attrs[NL80211_ATTR_IE]) {
2311                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2312                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2313         }
2314
2315         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2316                 bcn->proberesp_ies =
2317                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2318                 bcn->proberesp_ies_len =
2319                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2320         }
2321
2322         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2323                 bcn->assocresp_ies =
2324                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2325                 bcn->assocresp_ies_len =
2326                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2327         }
2328
2329         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2330                 bcn->probe_resp =
2331                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2332                 bcn->probe_resp_len =
2333                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2334         }
2335
2336         return 0;
2337 }
2338
2339 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2340                                    struct cfg80211_ap_settings *params)
2341 {
2342         struct wireless_dev *wdev;
2343         bool ret = false;
2344
2345         mutex_lock(&rdev->devlist_mtx);
2346
2347         list_for_each_entry(wdev, &rdev->netdev_list, list) {
2348                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2349                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2350                         continue;
2351
2352                 if (!wdev->preset_chan)
2353                         continue;
2354
2355                 params->channel = wdev->preset_chan;
2356                 params->channel_type = wdev->preset_chantype;
2357                 ret = true;
2358                 break;
2359         }
2360
2361         mutex_unlock(&rdev->devlist_mtx);
2362
2363         return ret;
2364 }
2365
2366 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2367 {
2368         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2369         struct net_device *dev = info->user_ptr[1];
2370         struct wireless_dev *wdev = dev->ieee80211_ptr;
2371         struct cfg80211_ap_settings params;
2372         int err;
2373
2374         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2375             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2376                 return -EOPNOTSUPP;
2377
2378         if (!rdev->ops->start_ap)
2379                 return -EOPNOTSUPP;
2380
2381         if (wdev->beacon_interval)
2382                 return -EALREADY;
2383
2384         memset(&params, 0, sizeof(params));
2385
2386         /* these are required for START_AP */
2387         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2388             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2389             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2390                 return -EINVAL;
2391
2392         err = nl80211_parse_beacon(info, &params.beacon);
2393         if (err)
2394                 return err;
2395
2396         params.beacon_interval =
2397                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2398         params.dtim_period =
2399                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2400
2401         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2402         if (err)
2403                 return err;
2404
2405         /*
2406          * In theory, some of these attributes should be required here
2407          * but since they were not used when the command was originally
2408          * added, keep them optional for old user space programs to let
2409          * them continue to work with drivers that do not need the
2410          * additional information -- drivers must check!
2411          */
2412         if (info->attrs[NL80211_ATTR_SSID]) {
2413                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2414                 params.ssid_len =
2415                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2416                 if (params.ssid_len == 0 ||
2417                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2418                         return -EINVAL;
2419         }
2420
2421         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2422                 params.hidden_ssid = nla_get_u32(
2423                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2424                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2425                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2426                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2427                         return -EINVAL;
2428         }
2429
2430         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2431
2432         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2433                 params.auth_type = nla_get_u32(
2434                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2435                 if (!nl80211_valid_auth_type(params.auth_type))
2436                         return -EINVAL;
2437         } else
2438                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2439
2440         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2441                                       NL80211_MAX_NR_CIPHER_SUITES);
2442         if (err)
2443                 return err;
2444
2445         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2446                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2447                         return -EOPNOTSUPP;
2448                 params.inactivity_timeout = nla_get_u16(
2449                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2450         }
2451
2452         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2453                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2454
2455                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2456                     !nl80211_valid_channel_type(info, &channel_type))
2457                         return -EINVAL;
2458
2459                 params.channel = rdev_freq_to_chan(rdev,
2460                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2461                         channel_type);
2462                 if (!params.channel)
2463                         return -EINVAL;
2464                 params.channel_type = channel_type;
2465         } else if (wdev->preset_chan) {
2466                 params.channel = wdev->preset_chan;
2467                 params.channel_type = wdev->preset_chantype;
2468         } else if (!nl80211_get_ap_channel(rdev, &params))
2469                 return -EINVAL;
2470
2471         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2472                                           params.channel_type))
2473                 return -EINVAL;
2474
2475         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2476         if (!err) {
2477                 wdev->preset_chan = params.channel;
2478                 wdev->preset_chantype = params.channel_type;
2479                 wdev->beacon_interval = params.beacon_interval;
2480         }
2481         return err;
2482 }
2483
2484 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2485 {
2486         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2487         struct net_device *dev = info->user_ptr[1];
2488         struct wireless_dev *wdev = dev->ieee80211_ptr;
2489         struct cfg80211_beacon_data params;
2490         int err;
2491
2492         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2493             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2494                 return -EOPNOTSUPP;
2495
2496         if (!rdev->ops->change_beacon)
2497                 return -EOPNOTSUPP;
2498
2499         if (!wdev->beacon_interval)
2500                 return -EINVAL;
2501
2502         err = nl80211_parse_beacon(info, &params);
2503         if (err)
2504                 return err;
2505
2506         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2507 }
2508
2509 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2510 {
2511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2512         struct net_device *dev = info->user_ptr[1];
2513         struct wireless_dev *wdev = dev->ieee80211_ptr;
2514         int err;
2515
2516         if (!rdev->ops->stop_ap)
2517                 return -EOPNOTSUPP;
2518
2519         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2520             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2521                 return -EOPNOTSUPP;
2522
2523         if (!wdev->beacon_interval)
2524                 return -ENOENT;
2525
2526         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2527         if (!err)
2528                 wdev->beacon_interval = 0;
2529         return err;
2530 }
2531
2532 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2533         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2534         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2535         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2536         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2537         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2538         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2539 };
2540
2541 static int parse_station_flags(struct genl_info *info,
2542                                enum nl80211_iftype iftype,
2543                                struct station_parameters *params)
2544 {
2545         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2546         struct nlattr *nla;
2547         int flag;
2548
2549         /*
2550          * Try parsing the new attribute first so userspace
2551          * can specify both for older kernels.
2552          */
2553         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2554         if (nla) {
2555                 struct nl80211_sta_flag_update *sta_flags;
2556
2557                 sta_flags = nla_data(nla);
2558                 params->sta_flags_mask = sta_flags->mask;
2559                 params->sta_flags_set = sta_flags->set;
2560                 if ((params->sta_flags_mask |
2561                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2562                         return -EINVAL;
2563                 return 0;
2564         }
2565
2566         /* if present, parse the old attribute */
2567
2568         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2569         if (!nla)
2570                 return 0;
2571
2572         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2573                              nla, sta_flags_policy))
2574                 return -EINVAL;
2575
2576         /*
2577          * Only allow certain flags for interface types so that
2578          * other attributes are silently ignored. Remember that
2579          * this is backward compatibility code with old userspace
2580          * and shouldn't be hit in other cases anyway.
2581          */
2582         switch (iftype) {
2583         case NL80211_IFTYPE_AP:
2584         case NL80211_IFTYPE_AP_VLAN:
2585         case NL80211_IFTYPE_P2P_GO:
2586                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2587                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2588                                          BIT(NL80211_STA_FLAG_WME) |
2589                                          BIT(NL80211_STA_FLAG_MFP);
2590                 break;
2591         case NL80211_IFTYPE_P2P_CLIENT:
2592         case NL80211_IFTYPE_STATION:
2593                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2594                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2595                 break;
2596         case NL80211_IFTYPE_MESH_POINT:
2597                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2598                                          BIT(NL80211_STA_FLAG_MFP) |
2599                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2600         default:
2601                 return -EINVAL;
2602         }
2603
2604         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2605                 if (flags[flag]) {
2606                         params->sta_flags_set |= (1<<flag);
2607
2608                         /* no longer support new API additions in old API */
2609                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2610                                 return -EINVAL;
2611                 }
2612         }
2613
2614         return 0;
2615 }
2616
2617 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2618                                  int attr)
2619 {
2620         struct nlattr *rate;
2621         u16 bitrate;
2622
2623         rate = nla_nest_start(msg, attr);
2624         if (!rate)
2625                 goto nla_put_failure;
2626
2627         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2628         bitrate = cfg80211_calculate_bitrate(info);
2629         if ((bitrate > 0 &&
2630              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2631             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2632              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2633             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2634              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2635             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2636              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2637                 goto nla_put_failure;
2638
2639         nla_nest_end(msg, rate);
2640         return true;
2641
2642 nla_put_failure:
2643         return false;
2644 }
2645
2646 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2647                                 int flags,
2648                                 struct cfg80211_registered_device *rdev,
2649                                 struct net_device *dev,
2650                                 const u8 *mac_addr, struct station_info *sinfo)
2651 {
2652         void *hdr;
2653         struct nlattr *sinfoattr, *bss_param;
2654
2655         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2656         if (!hdr)
2657                 return -1;
2658
2659         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2660             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2661             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2662                 goto nla_put_failure;
2663
2664         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2665         if (!sinfoattr)
2666                 goto nla_put_failure;
2667         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2668             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2669                         sinfo->connected_time))
2670                 goto nla_put_failure;
2671         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2672             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2673                         sinfo->inactive_time))
2674                 goto nla_put_failure;
2675         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2676             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2677                         sinfo->rx_bytes))
2678                 goto nla_put_failure;
2679         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2680             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2681                         sinfo->tx_bytes))
2682                 goto nla_put_failure;
2683         if ((sinfo->filled & STATION_INFO_LLID) &&
2684             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2685                 goto nla_put_failure;
2686         if ((sinfo->filled & STATION_INFO_PLID) &&
2687             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2688                 goto nla_put_failure;
2689         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2690             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2691                        sinfo->plink_state))
2692                 goto nla_put_failure;
2693         switch (rdev->wiphy.signal_type) {
2694         case CFG80211_SIGNAL_TYPE_MBM:
2695                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2696                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2697                                sinfo->signal))
2698                         goto nla_put_failure;
2699                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2700                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2701                                sinfo->signal_avg))
2702                         goto nla_put_failure;
2703                 break;
2704         default:
2705                 break;
2706         }
2707         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2708                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2709                                           NL80211_STA_INFO_TX_BITRATE))
2710                         goto nla_put_failure;
2711         }
2712         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2713                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2714                                           NL80211_STA_INFO_RX_BITRATE))
2715                         goto nla_put_failure;
2716         }
2717         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2718             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2719                         sinfo->rx_packets))
2720                 goto nla_put_failure;
2721         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2722             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2723                         sinfo->tx_packets))
2724                 goto nla_put_failure;
2725         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2726             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2727                         sinfo->tx_retries))
2728                 goto nla_put_failure;
2729         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2730             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2731                         sinfo->tx_failed))
2732                 goto nla_put_failure;
2733         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2734             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2735                         sinfo->beacon_loss_count))
2736                 goto nla_put_failure;
2737         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2738                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2739                 if (!bss_param)
2740                         goto nla_put_failure;
2741
2742                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2743                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2744                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2745                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2746                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2747                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2748                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2749                                sinfo->bss_param.dtim_period) ||
2750                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2751                                 sinfo->bss_param.beacon_interval))
2752                         goto nla_put_failure;
2753
2754                 nla_nest_end(msg, bss_param);
2755         }
2756         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2757             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2758                     sizeof(struct nl80211_sta_flag_update),
2759                     &sinfo->sta_flags))
2760                 goto nla_put_failure;
2761         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2762                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2763                             sinfo->t_offset))
2764                 goto nla_put_failure;
2765         nla_nest_end(msg, sinfoattr);
2766
2767         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2768             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2769                     sinfo->assoc_req_ies))
2770                 goto nla_put_failure;
2771
2772         return genlmsg_end(msg, hdr);
2773
2774  nla_put_failure:
2775         genlmsg_cancel(msg, hdr);
2776         return -EMSGSIZE;
2777 }
2778
2779 static int nl80211_dump_station(struct sk_buff *skb,
2780                                 struct netlink_callback *cb)
2781 {
2782         struct station_info sinfo;
2783         struct cfg80211_registered_device *dev;
2784         struct net_device *netdev;
2785         u8 mac_addr[ETH_ALEN];
2786         int sta_idx = cb->args[1];
2787         int err;
2788
2789         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2790         if (err)
2791                 return err;
2792
2793         if (!dev->ops->dump_station) {
2794                 err = -EOPNOTSUPP;
2795                 goto out_err;
2796         }
2797
2798         while (1) {
2799                 memset(&sinfo, 0, sizeof(sinfo));
2800                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2801                                              mac_addr, &sinfo);
2802                 if (err == -ENOENT)
2803                         break;
2804                 if (err)
2805                         goto out_err;
2806
2807                 if (nl80211_send_station(skb,
2808                                 NETLINK_CB(cb->skb).pid,
2809                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2810                                 dev, netdev, mac_addr,
2811                                 &sinfo) < 0)
2812                         goto out;
2813
2814                 sta_idx++;
2815         }
2816
2817
2818  out:
2819         cb->args[1] = sta_idx;
2820         err = skb->len;
2821  out_err:
2822         nl80211_finish_netdev_dump(dev);
2823
2824         return err;
2825 }
2826
2827 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2828 {
2829         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2830         struct net_device *dev = info->user_ptr[1];
2831         struct station_info sinfo;
2832         struct sk_buff *msg;
2833         u8 *mac_addr = NULL;
2834         int err;
2835
2836         memset(&sinfo, 0, sizeof(sinfo));
2837
2838         if (!info->attrs[NL80211_ATTR_MAC])
2839                 return -EINVAL;
2840
2841         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2842
2843         if (!rdev->ops->get_station)
2844                 return -EOPNOTSUPP;
2845
2846         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2847         if (err)
2848                 return err;
2849
2850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2851         if (!msg)
2852                 return -ENOMEM;
2853
2854         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2855                                  rdev, dev, mac_addr, &sinfo) < 0) {
2856                 nlmsg_free(msg);
2857                 return -ENOBUFS;
2858         }
2859
2860         return genlmsg_reply(msg, info);
2861 }
2862
2863 /*
2864  * Get vlan interface making sure it is running and on the right wiphy.
2865  */
2866 static struct net_device *get_vlan(struct genl_info *info,
2867                                    struct cfg80211_registered_device *rdev)
2868 {
2869         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2870         struct net_device *v;
2871         int ret;
2872
2873         if (!vlanattr)
2874                 return NULL;
2875
2876         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2877         if (!v)
2878                 return ERR_PTR(-ENODEV);
2879
2880         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2881                 ret = -EINVAL;
2882                 goto error;
2883         }
2884
2885         if (!netif_running(v)) {
2886                 ret = -ENETDOWN;
2887                 goto error;
2888         }
2889
2890         return v;
2891  error:
2892         dev_put(v);
2893         return ERR_PTR(ret);
2894 }
2895
2896 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2897 {
2898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2899         int err;
2900         struct net_device *dev = info->user_ptr[1];
2901         struct station_parameters params;
2902         u8 *mac_addr = NULL;
2903
2904         memset(&params, 0, sizeof(params));
2905
2906         params.listen_interval = -1;
2907         params.plink_state = -1;
2908
2909         if (info->attrs[NL80211_ATTR_STA_AID])
2910                 return -EINVAL;
2911
2912         if (!info->attrs[NL80211_ATTR_MAC])
2913                 return -EINVAL;
2914
2915         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2916
2917         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2918                 params.supported_rates =
2919                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2920                 params.supported_rates_len =
2921                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2922         }
2923
2924         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2925                 params.listen_interval =
2926                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2927
2928         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2929                 params.ht_capa =
2930                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2931
2932         if (!rdev->ops->change_station)
2933                 return -EOPNOTSUPP;
2934
2935         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2936                 return -EINVAL;
2937
2938         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2939                 params.plink_action =
2940                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2941
2942         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2943                 params.plink_state =
2944                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2945
2946         switch (dev->ieee80211_ptr->iftype) {
2947         case NL80211_IFTYPE_AP:
2948         case NL80211_IFTYPE_AP_VLAN:
2949         case NL80211_IFTYPE_P2P_GO:
2950                 /* disallow mesh-specific things */
2951                 if (params.plink_action)
2952                         return -EINVAL;
2953
2954                 /* TDLS can't be set, ... */
2955                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2956                         return -EINVAL;
2957                 /*
2958                  * ... but don't bother the driver with it. This works around
2959                  * a hostapd/wpa_supplicant issue -- it always includes the
2960                  * TLDS_PEER flag in the mask even for AP mode.
2961                  */
2962                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2963
2964                 /* accept only the listed bits */
2965                 if (params.sta_flags_mask &
2966                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2967                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2968                                   BIT(NL80211_STA_FLAG_WME) |
2969                                   BIT(NL80211_STA_FLAG_MFP)))
2970                         return -EINVAL;
2971
2972                 /* must be last in here for error handling */
2973                 params.vlan = get_vlan(info, rdev);
2974                 if (IS_ERR(params.vlan))
2975                         return PTR_ERR(params.vlan);
2976                 break;
2977         case NL80211_IFTYPE_P2P_CLIENT:
2978         case NL80211_IFTYPE_STATION:
2979                 /*
2980                  * Don't allow userspace to change the TDLS_PEER flag,
2981                  * but silently ignore attempts to change it since we
2982                  * don't have state here to verify that it doesn't try
2983                  * to change the flag.
2984                  */
2985                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2986                 /* fall through */
2987         case NL80211_IFTYPE_ADHOC:
2988                 /* disallow things sta doesn't support */
2989                 if (params.plink_action)
2990                         return -EINVAL;
2991                 if (params.ht_capa)
2992                         return -EINVAL;
2993                 if (params.listen_interval >= 0)
2994                         return -EINVAL;
2995                 /* reject any changes other than AUTHORIZED */
2996                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2997                         return -EINVAL;
2998                 break;
2999         case NL80211_IFTYPE_MESH_POINT:
3000                 /* disallow things mesh doesn't support */
3001                 if (params.vlan)
3002                         return -EINVAL;
3003                 if (params.ht_capa)
3004                         return -EINVAL;
3005                 if (params.listen_interval >= 0)
3006                         return -EINVAL;
3007                 /*
3008                  * No special handling for TDLS here -- the userspace
3009                  * mesh code doesn't have this bug.
3010                  */
3011                 if (params.sta_flags_mask &
3012                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3013                                   BIT(NL80211_STA_FLAG_MFP) |
3014                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3015                         return -EINVAL;
3016                 break;
3017         default:
3018                 return -EOPNOTSUPP;
3019         }
3020
3021         /* be aware of params.vlan when changing code here */
3022
3023         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3024
3025         if (params.vlan)
3026                 dev_put(params.vlan);
3027
3028         return err;
3029 }
3030
3031 static struct nla_policy
3032 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3033         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3034         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3035 };
3036
3037 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3038 {
3039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3040         int err;
3041         struct net_device *dev = info->user_ptr[1];
3042         struct station_parameters params;
3043         u8 *mac_addr = NULL;
3044
3045         memset(&params, 0, sizeof(params));
3046
3047         if (!info->attrs[NL80211_ATTR_MAC])
3048                 return -EINVAL;
3049
3050         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3051                 return -EINVAL;
3052
3053         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3054                 return -EINVAL;
3055
3056         if (!info->attrs[NL80211_ATTR_STA_AID])
3057                 return -EINVAL;
3058
3059         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3060         params.supported_rates =
3061                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3062         params.supported_rates_len =
3063                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3064         params.listen_interval =
3065                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3066
3067         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3068         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3069                 return -EINVAL;
3070
3071         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3072                 params.ht_capa =
3073                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3074
3075         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3076                 params.plink_action =
3077                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3078
3079         if (!rdev->ops->add_station)
3080                 return -EOPNOTSUPP;
3081
3082         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3083                 return -EINVAL;
3084
3085         switch (dev->ieee80211_ptr->iftype) {
3086         case NL80211_IFTYPE_AP:
3087         case NL80211_IFTYPE_AP_VLAN:
3088         case NL80211_IFTYPE_P2P_GO:
3089                 /* parse WME attributes if sta is WME capable */
3090                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3091                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3092                     info->attrs[NL80211_ATTR_STA_WME]) {
3093                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3094                         struct nlattr *nla;
3095
3096                         nla = info->attrs[NL80211_ATTR_STA_WME];
3097                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3098                                                nl80211_sta_wme_policy);
3099                         if (err)
3100                                 return err;
3101
3102                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3103                                 params.uapsd_queues =
3104                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3105                         if (params.uapsd_queues &
3106                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3107                                 return -EINVAL;
3108
3109                         if (tb[NL80211_STA_WME_MAX_SP])
3110                                 params.max_sp =
3111                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3112
3113                         if (params.max_sp &
3114                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3115                                 return -EINVAL;
3116
3117                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3118                 }
3119                 /* TDLS peers cannot be added */
3120                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3121                         return -EINVAL;
3122                 /* but don't bother the driver with it */
3123                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3124
3125                 /* must be last in here for error handling */
3126                 params.vlan = get_vlan(info, rdev);
3127                 if (IS_ERR(params.vlan))
3128                         return PTR_ERR(params.vlan);
3129                 break;
3130         case NL80211_IFTYPE_MESH_POINT:
3131                 /* TDLS peers cannot be added */
3132                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3133                         return -EINVAL;
3134                 break;
3135         case NL80211_IFTYPE_STATION:
3136                 /* Only TDLS peers can be added */
3137                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3138                         return -EINVAL;
3139                 /* Can only add if TDLS ... */
3140                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3141                         return -EOPNOTSUPP;
3142                 /* ... with external setup is supported */
3143                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3144                         return -EOPNOTSUPP;
3145                 break;
3146         default:
3147                 return -EOPNOTSUPP;
3148         }
3149
3150         /* be aware of params.vlan when changing code here */
3151
3152         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3153
3154         if (params.vlan)
3155                 dev_put(params.vlan);
3156         return err;
3157 }
3158
3159 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3160 {
3161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3162         struct net_device *dev = info->user_ptr[1];
3163         u8 *mac_addr = NULL;
3164
3165         if (info->attrs[NL80211_ATTR_MAC])
3166                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3167
3168         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3169             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3170             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3171             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3172                 return -EINVAL;
3173
3174         if (!rdev->ops->del_station)
3175                 return -EOPNOTSUPP;
3176
3177         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3178 }
3179
3180 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3181                                 int flags, struct net_device *dev,
3182                                 u8 *dst, u8 *next_hop,
3183                                 struct mpath_info *pinfo)
3184 {
3185         void *hdr;
3186         struct nlattr *pinfoattr;
3187
3188         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3189         if (!hdr)
3190                 return -1;
3191
3192         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3193             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3194             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3195             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3196                 goto nla_put_failure;
3197
3198         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3199         if (!pinfoattr)
3200                 goto nla_put_failure;
3201         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3202             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3203                         pinfo->frame_qlen))
3204                 goto nla_put_failure;
3205         if (((pinfo->filled & MPATH_INFO_SN) &&
3206              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3207             ((pinfo->filled & MPATH_INFO_METRIC) &&
3208              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3209                          pinfo->metric)) ||
3210             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3211              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3212                          pinfo->exptime)) ||
3213             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3214              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3215                         pinfo->flags)) ||
3216             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3217              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3218                          pinfo->discovery_timeout)) ||
3219             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3220              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3221                         pinfo->discovery_retries)))
3222                 goto nla_put_failure;
3223
3224         nla_nest_end(msg, pinfoattr);
3225
3226         return genlmsg_end(msg, hdr);
3227
3228  nla_put_failure:
3229         genlmsg_cancel(msg, hdr);
3230         return -EMSGSIZE;
3231 }
3232
3233 static int nl80211_dump_mpath(struct sk_buff *skb,
3234                               struct netlink_callback *cb)
3235 {
3236         struct mpath_info pinfo;
3237         struct cfg80211_registered_device *dev;
3238         struct net_device *netdev;
3239         u8 dst[ETH_ALEN];
3240         u8 next_hop[ETH_ALEN];
3241         int path_idx = cb->args[1];
3242         int err;
3243
3244         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3245         if (err)
3246                 return err;
3247
3248         if (!dev->ops->dump_mpath) {
3249                 err = -EOPNOTSUPP;
3250                 goto out_err;
3251         }
3252
3253         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3254                 err = -EOPNOTSUPP;
3255                 goto out_err;
3256         }
3257
3258         while (1) {
3259                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3260                                            dst, next_hop, &pinfo);
3261                 if (err == -ENOENT)
3262                         break;
3263                 if (err)
3264                         goto out_err;
3265
3266                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3267                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3268                                        netdev, dst, next_hop,
3269                                        &pinfo) < 0)
3270                         goto out;
3271
3272                 path_idx++;
3273         }
3274
3275
3276  out:
3277         cb->args[1] = path_idx;
3278         err = skb->len;
3279  out_err:
3280         nl80211_finish_netdev_dump(dev);
3281         return err;
3282 }
3283
3284 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3285 {
3286         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3287         int err;
3288         struct net_device *dev = info->user_ptr[1];
3289         struct mpath_info pinfo;
3290         struct sk_buff *msg;
3291         u8 *dst = NULL;
3292         u8 next_hop[ETH_ALEN];
3293
3294         memset(&pinfo, 0, sizeof(pinfo));
3295
3296         if (!info->attrs[NL80211_ATTR_MAC])
3297                 return -EINVAL;
3298
3299         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3300
3301         if (!rdev->ops->get_mpath)
3302                 return -EOPNOTSUPP;
3303
3304         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3305                 return -EOPNOTSUPP;
3306
3307         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3308         if (err)
3309                 return err;
3310
3311         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3312         if (!msg)
3313                 return -ENOMEM;
3314
3315         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3316                                  dev, dst, next_hop, &pinfo) < 0) {
3317                 nlmsg_free(msg);
3318                 return -ENOBUFS;
3319         }
3320
3321         return genlmsg_reply(msg, info);
3322 }
3323
3324 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3325 {
3326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3327         struct net_device *dev = info->user_ptr[1];
3328         u8 *dst = NULL;
3329         u8 *next_hop = NULL;
3330
3331         if (!info->attrs[NL80211_ATTR_MAC])
3332                 return -EINVAL;
3333
3334         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3335                 return -EINVAL;
3336
3337         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3338         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3339
3340         if (!rdev->ops->change_mpath)
3341                 return -EOPNOTSUPP;
3342
3343         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3344                 return -EOPNOTSUPP;
3345
3346         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3347 }
3348
3349 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3350 {
3351         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3352         struct net_device *dev = info->user_ptr[1];
3353         u8 *dst = NULL;
3354         u8 *next_hop = NULL;
3355
3356         if (!info->attrs[NL80211_ATTR_MAC])
3357                 return -EINVAL;
3358
3359         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3360                 return -EINVAL;
3361
3362         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3363         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3364
3365         if (!rdev->ops->add_mpath)
3366                 return -EOPNOTSUPP;
3367
3368         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3369                 return -EOPNOTSUPP;
3370
3371         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3372 }
3373
3374 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3375 {
3376         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3377         struct net_device *dev = info->user_ptr[1];
3378         u8 *dst = NULL;
3379
3380         if (info->attrs[NL80211_ATTR_MAC])
3381                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3382
3383         if (!rdev->ops->del_mpath)
3384                 return -EOPNOTSUPP;
3385
3386         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3387 }
3388
3389 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3390 {
3391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3392         struct net_device *dev = info->user_ptr[1];
3393         struct bss_parameters params;
3394
3395         memset(&params, 0, sizeof(params));
3396         /* default to not changing parameters */
3397         params.use_cts_prot = -1;
3398         params.use_short_preamble = -1;
3399         params.use_short_slot_time = -1;
3400         params.ap_isolate = -1;
3401         params.ht_opmode = -1;
3402
3403         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3404                 params.use_cts_prot =
3405                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3406         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3407                 params.use_short_preamble =
3408                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3409         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3410                 params.use_short_slot_time =
3411                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3412         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3413                 params.basic_rates =
3414                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3415                 params.basic_rates_len =
3416                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3417         }
3418         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3419                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3420         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3421                 params.ht_opmode =
3422                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3423
3424         if (!rdev->ops->change_bss)
3425                 return -EOPNOTSUPP;
3426
3427         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3428             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3429                 return -EOPNOTSUPP;
3430
3431         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3432 }
3433
3434 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3435         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3436         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3437         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3438         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3439         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3440         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3441 };
3442
3443 static int parse_reg_rule(struct nlattr *tb[],
3444         struct ieee80211_reg_rule *reg_rule)
3445 {
3446         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3447         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3448
3449         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3450                 return -EINVAL;
3451         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3452                 return -EINVAL;
3453         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3454                 return -EINVAL;
3455         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3456                 return -EINVAL;
3457         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3458                 return -EINVAL;
3459
3460         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3461
3462         freq_range->start_freq_khz =
3463                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3464         freq_range->end_freq_khz =
3465                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3466         freq_range->max_bandwidth_khz =
3467                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3468
3469         power_rule->max_eirp =
3470                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3471
3472         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3473                 power_rule->max_antenna_gain =
3474                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3475
3476         return 0;
3477 }
3478
3479 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3480 {
3481         int r;
3482         char *data = NULL;
3483
3484         /*
3485          * You should only get this when cfg80211 hasn't yet initialized
3486          * completely when built-in to the kernel right between the time
3487          * window between nl80211_init() and regulatory_init(), if that is
3488          * even possible.
3489          */
3490         mutex_lock(&cfg80211_mutex);
3491         if (unlikely(!cfg80211_regdomain)) {
3492                 mutex_unlock(&cfg80211_mutex);
3493                 return -EINPROGRESS;
3494         }
3495         mutex_unlock(&cfg80211_mutex);
3496
3497         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3498                 return -EINVAL;
3499
3500         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3501
3502         r = regulatory_hint_user(data);
3503
3504         return r;
3505 }
3506
3507 static int nl80211_get_mesh_config(struct sk_buff *skb,
3508                                    struct genl_info *info)
3509 {
3510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3511         struct net_device *dev = info->user_ptr[1];
3512         struct wireless_dev *wdev = dev->ieee80211_ptr;
3513         struct mesh_config cur_params;
3514         int err = 0;
3515         void *hdr;
3516         struct nlattr *pinfoattr;
3517         struct sk_buff *msg;
3518
3519         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3520                 return -EOPNOTSUPP;
3521
3522         if (!rdev->ops->get_mesh_config)
3523                 return -EOPNOTSUPP;
3524
3525         wdev_lock(wdev);
3526         /* If not connected, get default parameters */
3527         if (!wdev->mesh_id_len)
3528                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3529         else
3530                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3531                                                  &cur_params);
3532         wdev_unlock(wdev);
3533
3534         if (err)
3535                 return err;
3536
3537         /* Draw up a netlink message to send back */
3538         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3539         if (!msg)
3540                 return -ENOMEM;
3541         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3542                              NL80211_CMD_GET_MESH_CONFIG);
3543         if (!hdr)
3544                 goto out;
3545         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3546         if (!pinfoattr)
3547                 goto nla_put_failure;
3548         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3549             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3550                         cur_params.dot11MeshRetryTimeout) ||
3551             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3552                         cur_params.dot11MeshConfirmTimeout) ||
3553             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3554                         cur_params.dot11MeshHoldingTimeout) ||
3555             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3556                         cur_params.dot11MeshMaxPeerLinks) ||
3557             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3558                        cur_params.dot11MeshMaxRetries) ||
3559             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3560                        cur_params.dot11MeshTTL) ||
3561             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3562                        cur_params.element_ttl) ||
3563             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3564                        cur_params.auto_open_plinks) ||
3565             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3566                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3567             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3568                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3569             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3570                         cur_params.path_refresh_time) ||
3571             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3572                         cur_params.min_discovery_timeout) ||
3573             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3574                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3575             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3576                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3577             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3578                         cur_params.dot11MeshHWMPperrMinInterval) ||
3579             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3580                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3581             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3582                        cur_params.dot11MeshHWMPRootMode) ||
3583             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3584                         cur_params.dot11MeshHWMPRannInterval) ||
3585             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3586                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3587             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3588                        cur_params.dot11MeshForwarding) ||
3589             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3590                         cur_params.rssi_threshold) ||
3591             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3592                         cur_params.ht_opmode) ||
3593             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3594                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3595             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3596                         cur_params.dot11MeshHWMProotInterval) ||
3597             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3598                         cur_params.dot11MeshHWMPconfirmationInterval))
3599                 goto nla_put_failure;
3600         nla_nest_end(msg, pinfoattr);
3601         genlmsg_end(msg, hdr);
3602         return genlmsg_reply(msg, info);
3603
3604  nla_put_failure:
3605         genlmsg_cancel(msg, hdr);
3606  out:
3607         nlmsg_free(msg);
3608         return -ENOBUFS;
3609 }
3610
3611 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3612         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3613         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3614         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3615         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3616         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3617         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3618         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3619         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3620         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3621         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3622         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3623         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3624         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3625         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3626         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3627         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3628         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3629         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3630         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3631         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3632         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3633         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3634         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3635         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3636         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3637 };
3638
3639 static const struct nla_policy
3640         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3641         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3642         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3643         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3644         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3645         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3646                                     .len = IEEE80211_MAX_DATA_LEN },
3647         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3648 };
3649
3650 static int nl80211_parse_mesh_config(struct genl_info *info,
3651                                      struct mesh_config *cfg,
3652                                      u32 *mask_out)
3653 {
3654         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3655         u32 mask = 0;
3656
3657 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3658 do {\
3659         if (table[attr_num]) {\
3660                 cfg->param = nla_fn(table[attr_num]); \
3661                 mask |= (1 << (attr_num - 1)); \
3662         } \
3663 } while (0);\
3664
3665
3666         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3667                 return -EINVAL;
3668         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3669                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3670                              nl80211_meshconf_params_policy))
3671                 return -EINVAL;
3672
3673         /* This makes sure that there aren't more than 32 mesh config
3674          * parameters (otherwise our bitfield scheme would not work.) */
3675         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3676
3677         /* Fill in the params struct */
3678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3679                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3680                                   nla_get_u16);
3681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3682                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3683                                   nla_get_u16);
3684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3685                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3686                                   nla_get_u16);
3687         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3688                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3689                                   nla_get_u16);
3690         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3691                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3692                                   nla_get_u8);
3693         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3694                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3695         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3696                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3697                                   nla_get_u8);
3698         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3699                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3700                                   nla_get_u8);
3701         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3702                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3703                                   nla_get_u32);
3704         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3705                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3706                                   nla_get_u8);
3707         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3708                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3709                                   nla_get_u32);
3710         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3711                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3712                                   nla_get_u16);
3713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3714                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3715                                   nla_get_u32);
3716         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3717                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3718                                   nla_get_u16);
3719         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3720                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3721                                   nla_get_u16);
3722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3723                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3724                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3725                                   nla_get_u16);
3726         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3727                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3729                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3730                                   nla_get_u16);
3731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3732                                   dot11MeshGateAnnouncementProtocol, mask,
3733                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3734                                   nla_get_u8);
3735         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3736                                   mask, NL80211_MESHCONF_FORWARDING,
3737                                   nla_get_u8);
3738         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3739                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3740                                   nla_get_u32);
3741         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3742                                   mask, NL80211_MESHCONF_HT_OPMODE,
3743                                   nla_get_u16);
3744         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3745                                   mask,
3746                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3747                                   nla_get_u32);
3748         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3749                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3750                                   nla_get_u16);
3751         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3752                                   dot11MeshHWMPconfirmationInterval, mask,
3753                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3754                                   nla_get_u16);
3755         if (mask_out)
3756                 *mask_out = mask;
3757
3758         return 0;
3759
3760 #undef FILL_IN_MESH_PARAM_IF_SET
3761 }
3762
3763 static int nl80211_parse_mesh_setup(struct genl_info *info,
3764                                      struct mesh_setup *setup)
3765 {
3766         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3767
3768         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3769                 return -EINVAL;
3770         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3771                              info->attrs[NL80211_ATTR_MESH_SETUP],
3772                              nl80211_mesh_setup_params_policy))
3773                 return -EINVAL;
3774
3775         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3776                 setup->sync_method =
3777                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3778                  IEEE80211_SYNC_METHOD_VENDOR :
3779                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3780
3781         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3782                 setup->path_sel_proto =
3783                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3784                  IEEE80211_PATH_PROTOCOL_VENDOR :
3785                  IEEE80211_PATH_PROTOCOL_HWMP;
3786
3787         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3788                 setup->path_metric =
3789                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3790                  IEEE80211_PATH_METRIC_VENDOR :
3791                  IEEE80211_PATH_METRIC_AIRTIME;
3792
3793
3794         if (tb[NL80211_MESH_SETUP_IE]) {
3795                 struct nlattr *ieattr =
3796                         tb[NL80211_MESH_SETUP_IE];
3797                 if (!is_valid_ie_attr(ieattr))
3798                         return -EINVAL;
3799                 setup->ie = nla_data(ieattr);
3800                 setup->ie_len = nla_len(ieattr);
3801         }
3802         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3803         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3804
3805         return 0;
3806 }
3807
3808 static int nl80211_update_mesh_config(struct sk_buff *skb,
3809                                       struct genl_info *info)
3810 {
3811         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3812         struct net_device *dev = info->user_ptr[1];
3813         struct wireless_dev *wdev = dev->ieee80211_ptr;
3814         struct mesh_config cfg;
3815         u32 mask;
3816         int err;
3817
3818         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3819                 return -EOPNOTSUPP;
3820
3821         if (!rdev->ops->update_mesh_config)
3822                 return -EOPNOTSUPP;
3823
3824         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3825         if (err)
3826                 return err;
3827
3828         wdev_lock(wdev);
3829         if (!wdev->mesh_id_len)
3830                 err = -ENOLINK;
3831
3832         if (!err)
3833                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3834                                                     mask, &cfg);
3835
3836         wdev_unlock(wdev);
3837
3838         return err;
3839 }
3840
3841 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3842 {
3843         struct sk_buff *msg;
3844         void *hdr = NULL;
3845         struct nlattr *nl_reg_rules;
3846         unsigned int i;
3847         int err = -EINVAL;
3848
3849         mutex_lock(&cfg80211_mutex);
3850
3851         if (!cfg80211_regdomain)
3852                 goto out;
3853
3854         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3855         if (!msg) {
3856                 err = -ENOBUFS;
3857                 goto out;
3858         }
3859
3860         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3861                              NL80211_CMD_GET_REG);
3862         if (!hdr)
3863                 goto put_failure;
3864
3865         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3866                            cfg80211_regdomain->alpha2) ||
3867             (cfg80211_regdomain->dfs_region &&
3868              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3869                         cfg80211_regdomain->dfs_region)))
3870                 goto nla_put_failure;
3871
3872         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3873         if (!nl_reg_rules)
3874                 goto nla_put_failure;
3875
3876         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3877                 struct nlattr *nl_reg_rule;
3878                 const struct ieee80211_reg_rule *reg_rule;
3879                 const struct ieee80211_freq_range *freq_range;
3880                 const struct ieee80211_power_rule *power_rule;
3881
3882                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3883                 freq_range = &reg_rule->freq_range;
3884                 power_rule = &reg_rule->power_rule;
3885
3886                 nl_reg_rule = nla_nest_start(msg, i);
3887                 if (!nl_reg_rule)
3888                         goto nla_put_failure;
3889
3890                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3891                                 reg_rule->flags) ||
3892                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3893                                 freq_range->start_freq_khz) ||
3894                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3895                                 freq_range->end_freq_khz) ||
3896                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3897                                 freq_range->max_bandwidth_khz) ||
3898                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3899                                 power_rule->max_antenna_gain) ||
3900                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3901                                 power_rule->max_eirp))
3902                         goto nla_put_failure;
3903
3904                 nla_nest_end(msg, nl_reg_rule);
3905         }
3906
3907         nla_nest_end(msg, nl_reg_rules);
3908
3909         genlmsg_end(msg, hdr);
3910         err = genlmsg_reply(msg, info);
3911         goto out;
3912
3913 nla_put_failure:
3914         genlmsg_cancel(msg, hdr);
3915 put_failure:
3916         nlmsg_free(msg);
3917         err = -EMSGSIZE;
3918 out:
3919         mutex_unlock(&cfg80211_mutex);
3920         return err;
3921 }
3922
3923 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3924 {
3925         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3926         struct nlattr *nl_reg_rule;
3927         char *alpha2 = NULL;
3928         int rem_reg_rules = 0, r = 0;
3929         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3930         u8 dfs_region = 0;
3931         struct ieee80211_regdomain *rd = NULL;
3932
3933         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3934                 return -EINVAL;
3935
3936         if (!info->attrs[NL80211_ATTR_REG_RULES])
3937                 return -EINVAL;
3938
3939         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3940
3941         if (info->attrs[NL80211_ATTR_DFS_REGION])
3942                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3943
3944         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3945                         rem_reg_rules) {
3946                 num_rules++;
3947                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3948                         return -EINVAL;
3949         }
3950
3951         mutex_lock(&cfg80211_mutex);
3952
3953         if (!reg_is_valid_request(alpha2)) {
3954                 r = -EINVAL;
3955                 goto bad_reg;
3956         }
3957
3958         size_of_regd = sizeof(struct ieee80211_regdomain) +
3959                 (num_rules * sizeof(struct ieee80211_reg_rule));
3960
3961         rd = kzalloc(size_of_regd, GFP_KERNEL);
3962         if (!rd) {
3963                 r = -ENOMEM;
3964                 goto bad_reg;
3965         }
3966
3967         rd->n_reg_rules = num_rules;
3968         rd->alpha2[0] = alpha2[0];
3969         rd->alpha2[1] = alpha2[1];
3970
3971         /*
3972          * Disable DFS master mode if the DFS region was
3973          * not supported or known on this kernel.
3974          */
3975         if (reg_supported_dfs_region(dfs_region))
3976                 rd->dfs_region = dfs_region;
3977
3978         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3979                         rem_reg_rules) {
3980                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3981                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3982                         reg_rule_policy);
3983                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3984                 if (r)
3985                         goto bad_reg;
3986
3987                 rule_idx++;
3988
3989                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3990                         r = -EINVAL;
3991                         goto bad_reg;
3992                 }
3993         }
3994
3995         BUG_ON(rule_idx != num_rules);
3996
3997         r = set_regdom(rd);
3998
3999         mutex_unlock(&cfg80211_mutex);
4000
4001         return r;
4002
4003  bad_reg:
4004         mutex_unlock(&cfg80211_mutex);
4005         kfree(rd);
4006         return r;
4007 }
4008
4009 static int validate_scan_freqs(struct nlattr *freqs)
4010 {
4011         struct nlattr *attr1, *attr2;
4012         int n_channels = 0, tmp1, tmp2;
4013
4014         nla_for_each_nested(attr1, freqs, tmp1) {
4015                 n_channels++;
4016                 /*
4017                  * Some hardware has a limited channel list for
4018                  * scanning, and it is pretty much nonsensical
4019                  * to scan for a channel twice, so disallow that
4020                  * and don't require drivers to check that the
4021                  * channel list they get isn't longer than what
4022                  * they can scan, as long as they can scan all
4023                  * the channels they registered at once.
4024                  */
4025                 nla_for_each_nested(attr2, freqs, tmp2)
4026                         if (attr1 != attr2 &&
4027                             nla_get_u32(attr1) == nla_get_u32(attr2))
4028                                 return 0;
4029         }
4030
4031         return n_channels;
4032 }
4033
4034 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4035 {
4036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4037         struct net_device *dev = info->user_ptr[1];
4038         struct cfg80211_scan_request *request;
4039         struct nlattr *attr;
4040         struct wiphy *wiphy;
4041         int err, tmp, n_ssids = 0, n_channels, i;
4042         size_t ie_len;
4043
4044         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4045                 return -EINVAL;
4046
4047         wiphy = &rdev->wiphy;
4048
4049         if (!rdev->ops->scan)
4050                 return -EOPNOTSUPP;
4051
4052         if (rdev->scan_req)
4053                 return -EBUSY;
4054
4055         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4056                 n_channels = validate_scan_freqs(
4057                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4058                 if (!n_channels)
4059                         return -EINVAL;
4060         } else {
4061                 enum ieee80211_band band;
4062                 n_channels = 0;
4063
4064                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4065                         if (wiphy->bands[band])
4066                                 n_channels += wiphy->bands[band]->n_channels;
4067         }
4068
4069         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4070                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4071                         n_ssids++;
4072
4073         if (n_ssids > wiphy->max_scan_ssids)
4074                 return -EINVAL;
4075
4076         if (info->attrs[NL80211_ATTR_IE])
4077                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4078         else
4079                 ie_len = 0;
4080
4081         if (ie_len > wiphy->max_scan_ie_len)
4082                 return -EINVAL;
4083
4084         request = kzalloc(sizeof(*request)
4085                         + sizeof(*request->ssids) * n_ssids
4086                         + sizeof(*request->channels) * n_channels
4087                         + ie_len, GFP_KERNEL);
4088         if (!request)
4089                 return -ENOMEM;
4090
4091         if (n_ssids)
4092                 request->ssids = (void *)&request->channels[n_channels];
4093         request->n_ssids = n_ssids;
4094         if (ie_len) {
4095                 if (request->ssids)
4096                         request->ie = (void *)(request->ssids + n_ssids);
4097                 else
4098                         request->ie = (void *)(request->channels + n_channels);
4099         }
4100
4101         i = 0;
4102         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4103                 /* user specified, bail out if channel not found */
4104                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4105                         struct ieee80211_channel *chan;
4106
4107                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4108
4109                         if (!chan) {
4110                                 err = -EINVAL;
4111                                 goto out_free;
4112                         }
4113
4114                         /* ignore disabled channels */
4115                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4116                                 continue;
4117
4118                         request->channels[i] = chan;
4119                         i++;
4120                 }
4121         } else {
4122                 enum ieee80211_band band;
4123
4124                 /* all channels */
4125                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4126                         int j;
4127                         if (!wiphy->bands[band])
4128                                 continue;
4129                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4130                                 struct ieee80211_channel *chan;
4131
4132                                 chan = &wiphy->bands[band]->channels[j];
4133
4134                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4135                                         continue;
4136
4137                                 request->channels[i] = chan;
4138                                 i++;
4139                         }
4140                 }
4141         }
4142
4143         if (!i) {
4144                 err = -EINVAL;
4145                 goto out_free;
4146         }
4147
4148         request->n_channels = i;
4149
4150         i = 0;
4151         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4152                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4153                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4154                                 err = -EINVAL;
4155                                 goto out_free;
4156                         }
4157                         request->ssids[i].ssid_len = nla_len(attr);
4158                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4159                         i++;
4160                 }
4161         }
4162
4163         if (info->attrs[NL80211_ATTR_IE]) {
4164                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4165                 memcpy((void *)request->ie,
4166                        nla_data(info->attrs[NL80211_ATTR_IE]),
4167                        request->ie_len);
4168         }
4169
4170         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4171                 if (wiphy->bands[i])
4172                         request->rates[i] =
4173                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4174
4175         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4176                 nla_for_each_nested(attr,
4177                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4178                                     tmp) {
4179                         enum ieee80211_band band = nla_type(attr);
4180
4181                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4182                                 err = -EINVAL;
4183                                 goto out_free;
4184                         }
4185                         err = ieee80211_get_ratemask(wiphy->bands[band],
4186                                                      nla_data(attr),
4187                                                      nla_len(attr),
4188                                                      &request->rates[band]);
4189                         if (err)
4190                                 goto out_free;
4191                 }
4192         }
4193
4194         request->no_cck =
4195                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4196
4197         request->dev = dev;
4198         request->wiphy = &rdev->wiphy;
4199
4200         rdev->scan_req = request;
4201         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4202
4203         if (!err) {
4204                 nl80211_send_scan_start(rdev, dev);
4205                 dev_hold(dev);
4206         } else {
4207  out_free:
4208                 rdev->scan_req = NULL;
4209                 kfree(request);
4210         }
4211
4212         return err;
4213 }
4214
4215 static int nl80211_start_sched_scan(struct sk_buff *skb,
4216                                     struct genl_info *info)
4217 {
4218         struct cfg80211_sched_scan_request *request;
4219         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4220         struct net_device *dev = info->user_ptr[1];
4221         struct nlattr *attr;
4222         struct wiphy *wiphy;
4223         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4224         u32 interval;
4225         enum ieee80211_band band;
4226         size_t ie_len;
4227         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4228
4229         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4230             !rdev->ops->sched_scan_start)
4231                 return -EOPNOTSUPP;
4232
4233         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4234                 return -EINVAL;
4235
4236         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4237                 return -EINVAL;
4238
4239         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4240         if (interval == 0)
4241                 return -EINVAL;
4242
4243         wiphy = &rdev->wiphy;
4244
4245         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4246                 n_channels = validate_scan_freqs(
4247                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4248                 if (!n_channels)
4249                         return -EINVAL;
4250         } else {
4251                 n_channels = 0;
4252
4253                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4254                         if (wiphy->bands[band])
4255                                 n_channels += wiphy->bands[band]->n_channels;
4256         }
4257
4258         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4259                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4260                                     tmp)
4261                         n_ssids++;
4262
4263         if (n_ssids > wiphy->max_sched_scan_ssids)
4264                 return -EINVAL;
4265
4266         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4267                 nla_for_each_nested(attr,
4268                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4269                                     tmp)
4270                         n_match_sets++;
4271
4272         if (n_match_sets > wiphy->max_match_sets)
4273                 return -EINVAL;
4274
4275         if (info->attrs[NL80211_ATTR_IE])
4276                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4277         else
4278                 ie_len = 0;
4279
4280         if (ie_len > wiphy->max_sched_scan_ie_len)
4281                 return -EINVAL;
4282
4283         mutex_lock(&rdev->sched_scan_mtx);
4284
4285         if (rdev->sched_scan_req) {
4286                 err = -EINPROGRESS;
4287                 goto out;
4288         }
4289
4290         request = kzalloc(sizeof(*request)
4291                         + sizeof(*request->ssids) * n_ssids
4292                         + sizeof(*request->match_sets) * n_match_sets
4293                         + sizeof(*request->channels) * n_channels
4294                         + ie_len, GFP_KERNEL);
4295         if (!request) {
4296                 err = -ENOMEM;
4297                 goto out;
4298         }
4299
4300         if (n_ssids)
4301                 request->ssids = (void *)&request->channels[n_channels];
4302         request->n_ssids = n_ssids;
4303         if (ie_len) {
4304                 if (request->ssids)
4305                         request->ie = (void *)(request->ssids + n_ssids);
4306                 else
4307                         request->ie = (void *)(request->channels + n_channels);
4308         }
4309
4310         if (n_match_sets) {
4311                 if (request->ie)
4312                         request->match_sets = (void *)(request->ie + ie_len);
4313                 else if (request->ssids)
4314                         request->match_sets =
4315                                 (void *)(request->ssids + n_ssids);
4316                 else
4317                         request->match_sets =
4318                                 (void *)(request->channels + n_channels);
4319         }
4320         request->n_match_sets = n_match_sets;
4321
4322         i = 0;
4323         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4324                 /* user specified, bail out if channel not found */
4325                 nla_for_each_nested(attr,
4326                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4327                                     tmp) {
4328                         struct ieee80211_channel *chan;
4329
4330                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4331
4332                         if (!chan) {
4333                                 err = -EINVAL;
4334                                 goto out_free;
4335                         }
4336
4337                         /* ignore disabled channels */
4338                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4339                                 continue;
4340
4341                         request->channels[i] = chan;
4342                         i++;
4343                 }
4344         } else {
4345                 /* all channels */
4346                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4347                         int j;
4348                         if (!wiphy->bands[band])
4349                                 continue;
4350                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4351                                 struct ieee80211_channel *chan;
4352
4353                                 chan = &wiphy->bands[band]->channels[j];
4354
4355                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4356                                         continue;
4357
4358                                 request->channels[i] = chan;
4359                                 i++;
4360                         }
4361                 }
4362         }
4363
4364         if (!i) {
4365                 err = -EINVAL;
4366                 goto out_free;
4367         }
4368
4369         request->n_channels = i;
4370
4371         i = 0;
4372         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4373                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4374                                     tmp) {
4375                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4376                                 err = -EINVAL;
4377                                 goto out_free;
4378                         }
4379                         request->ssids[i].ssid_len = nla_len(attr);
4380                         memcpy(request->ssids[i].ssid, nla_data(attr),
4381                                nla_len(attr));
4382                         i++;
4383                 }
4384         }
4385
4386         i = 0;
4387         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4388                 nla_for_each_nested(attr,
4389                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4390                                     tmp) {
4391                         struct nlattr *ssid, *rssi;
4392
4393                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4394                                   nla_data(attr), nla_len(attr),
4395                                   nl80211_match_policy);
4396                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4397                         if (ssid) {
4398                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4399                                         err = -EINVAL;
4400                                         goto out_free;
4401                                 }
4402                                 memcpy(request->match_sets[i].ssid.ssid,
4403                                        nla_data(ssid), nla_len(ssid));
4404                                 request->match_sets[i].ssid.ssid_len =
4405                                         nla_len(ssid);
4406                         }
4407                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4408                         if (rssi)
4409                                 request->rssi_thold = nla_get_u32(rssi);
4410                         else
4411                                 request->rssi_thold =
4412                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4413                         i++;
4414                 }
4415         }
4416
4417         if (info->attrs[NL80211_ATTR_IE]) {
4418                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4419                 memcpy((void *)request->ie,
4420                        nla_data(info->attrs[NL80211_ATTR_IE]),
4421                        request->ie_len);
4422         }
4423
4424         request->dev = dev;
4425         request->wiphy = &rdev->wiphy;
4426         request->interval = interval;
4427
4428         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4429         if (!err) {
4430                 rdev->sched_scan_req = request;
4431                 nl80211_send_sched_scan(rdev, dev,
4432                                         NL80211_CMD_START_SCHED_SCAN);
4433                 goto out;
4434         }
4435
4436 out_free:
4437         kfree(request);
4438 out:
4439         mutex_unlock(&rdev->sched_scan_mtx);
4440         return err;
4441 }
4442
4443 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4444                                    struct genl_info *info)
4445 {
4446         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4447         int err;
4448
4449         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4450             !rdev->ops->sched_scan_stop)
4451                 return -EOPNOTSUPP;
4452
4453         mutex_lock(&rdev->sched_scan_mtx);
4454         err = __cfg80211_stop_sched_scan(rdev, false);
4455         mutex_unlock(&rdev->sched_scan_mtx);
4456
4457         return err;
4458 }
4459
4460 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4461                             u32 seq, int flags,
4462                             struct cfg80211_registered_device *rdev,
4463                             struct wireless_dev *wdev,
4464                             struct cfg80211_internal_bss *intbss)
4465 {
4466         struct cfg80211_bss *res = &intbss->pub;
4467         void *hdr;
4468         struct nlattr *bss;
4469
4470         ASSERT_WDEV_LOCK(wdev);
4471
4472         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4473                              NL80211_CMD_NEW_SCAN_RESULTS);
4474         if (!hdr)
4475                 return -1;
4476
4477         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4478
4479         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4480             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4481                 goto nla_put_failure;
4482
4483         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4484         if (!bss)
4485                 goto nla_put_failure;
4486         if ((!is_zero_ether_addr(res->bssid) &&
4487              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4488             (res->information_elements && res->len_information_elements &&
4489              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4490                      res->len_information_elements,
4491                      res->information_elements)) ||
4492             (res->beacon_ies && res->len_beacon_ies &&
4493              res->beacon_ies != res->information_elements &&
4494              nla_put(msg, NL80211_BSS_BEACON_IES,
4495                      res->len_beacon_ies, res->beacon_ies)))
4496                 goto nla_put_failure;
4497         if (res->tsf &&
4498             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4499                 goto nla_put_failure;
4500         if (res->beacon_interval &&
4501             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4502                 goto nla_put_failure;
4503         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4504             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4505             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4506                         jiffies_to_msecs(jiffies - intbss->ts)))
4507                 goto nla_put_failure;
4508
4509         switch (rdev->wiphy.signal_type) {
4510         case CFG80211_SIGNAL_TYPE_MBM:
4511                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4512                         goto nla_put_failure;
4513                 break;
4514         case CFG80211_SIGNAL_TYPE_UNSPEC:
4515                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4516                         goto nla_put_failure;
4517                 break;
4518         default:
4519                 break;
4520         }
4521
4522         switch (wdev->iftype) {
4523         case NL80211_IFTYPE_P2P_CLIENT:
4524         case NL80211_IFTYPE_STATION:
4525                 if (intbss == wdev->current_bss &&
4526                     nla_put_u32(msg, NL80211_BSS_STATUS,
4527                                 NL80211_BSS_STATUS_ASSOCIATED))
4528                         goto nla_put_failure;
4529                 break;
4530         case NL80211_IFTYPE_ADHOC:
4531                 if (intbss == wdev->current_bss &&
4532                     nla_put_u32(msg, NL80211_BSS_STATUS,
4533                                 NL80211_BSS_STATUS_IBSS_JOINED))
4534                         goto nla_put_failure;
4535                 break;
4536         default:
4537                 break;
4538         }
4539
4540         nla_nest_end(msg, bss);
4541
4542         return genlmsg_end(msg, hdr);
4543
4544  nla_put_failure:
4545         genlmsg_cancel(msg, hdr);
4546         return -EMSGSIZE;
4547 }
4548
4549 static int nl80211_dump_scan(struct sk_buff *skb,
4550                              struct netlink_callback *cb)
4551 {
4552         struct cfg80211_registered_device *rdev;
4553         struct net_device *dev;
4554         struct cfg80211_internal_bss *scan;
4555         struct wireless_dev *wdev;
4556         int start = cb->args[1], idx = 0;
4557         int err;
4558
4559         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4560         if (err)
4561                 return err;
4562
4563         wdev = dev->ieee80211_ptr;
4564
4565         wdev_lock(wdev);
4566         spin_lock_bh(&rdev->bss_lock);
4567         cfg80211_bss_expire(rdev);
4568
4569         cb->seq = rdev->bss_generation;
4570
4571         list_for_each_entry(scan, &rdev->bss_list, list) {
4572                 if (++idx <= start)
4573                         continue;
4574                 if (nl80211_send_bss(skb, cb,
4575                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4576                                 rdev, wdev, scan) < 0) {
4577                         idx--;
4578                         break;
4579                 }
4580         }
4581
4582         spin_unlock_bh(&rdev->bss_lock);
4583         wdev_unlock(wdev);
4584
4585         cb->args[1] = idx;
4586         nl80211_finish_netdev_dump(rdev);
4587
4588         return skb->len;
4589 }
4590
4591 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4592                                 int flags, struct net_device *dev,
4593                                 struct survey_info *survey)
4594 {
4595         void *hdr;
4596         struct nlattr *infoattr;
4597
4598         hdr = nl80211hdr_put(msg, pid, seq, flags,
4599                              NL80211_CMD_NEW_SURVEY_RESULTS);
4600         if (!hdr)
4601                 return -ENOMEM;
4602
4603         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4604                 goto nla_put_failure;
4605
4606         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4607         if (!infoattr)
4608                 goto nla_put_failure;
4609
4610         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4611                         survey->channel->center_freq))
4612                 goto nla_put_failure;
4613
4614         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4615             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4616                 goto nla_put_failure;
4617         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4618             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4619                 goto nla_put_failure;
4620         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4621             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4622                         survey->channel_time))
4623                 goto nla_put_failure;
4624         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4625             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4626                         survey->channel_time_busy))
4627                 goto nla_put_failure;
4628         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4629             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4630                         survey->channel_time_ext_busy))
4631                 goto nla_put_failure;
4632         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4633             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4634                         survey->channel_time_rx))
4635                 goto nla_put_failure;
4636         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4637             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4638                         survey->channel_time_tx))
4639                 goto nla_put_failure;
4640
4641         nla_nest_end(msg, infoattr);
4642
4643         return genlmsg_end(msg, hdr);
4644
4645  nla_put_failure:
4646         genlmsg_cancel(msg, hdr);
4647         return -EMSGSIZE;
4648 }
4649
4650 static int nl80211_dump_survey(struct sk_buff *skb,
4651                         struct netlink_callback *cb)
4652 {
4653         struct survey_info survey;
4654         struct cfg80211_registered_device *dev;
4655         struct net_device *netdev;
4656         int survey_idx = cb->args[1];
4657         int res;
4658
4659         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4660         if (res)
4661                 return res;
4662
4663         if (!dev->ops->dump_survey) {
4664                 res = -EOPNOTSUPP;
4665                 goto out_err;
4666         }
4667
4668         while (1) {
4669                 struct ieee80211_channel *chan;
4670
4671                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4672                                             &survey);
4673                 if (res == -ENOENT)
4674                         break;
4675                 if (res)
4676                         goto out_err;
4677
4678                 /* Survey without a channel doesn't make sense */
4679                 if (!survey.channel) {
4680                         res = -EINVAL;
4681                         goto out;
4682                 }
4683
4684                 chan = ieee80211_get_channel(&dev->wiphy,
4685                                              survey.channel->center_freq);
4686                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4687                         survey_idx++;
4688                         continue;
4689                 }
4690
4691                 if (nl80211_send_survey(skb,
4692                                 NETLINK_CB(cb->skb).pid,
4693                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4694                                 netdev,
4695                                 &survey) < 0)
4696                         goto out;
4697                 survey_idx++;
4698         }
4699
4700  out:
4701         cb->args[1] = survey_idx;
4702         res = skb->len;
4703  out_err:
4704         nl80211_finish_netdev_dump(dev);
4705         return res;
4706 }
4707
4708 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4709 {
4710         return auth_type <= NL80211_AUTHTYPE_MAX;
4711 }
4712
4713 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4714 {
4715         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4716                                   NL80211_WPA_VERSION_2));
4717 }
4718
4719 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4720 {
4721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4722         struct net_device *dev = info->user_ptr[1];
4723         struct ieee80211_channel *chan;
4724         const u8 *bssid, *ssid, *ie = NULL;
4725         int err, ssid_len, ie_len = 0;
4726         enum nl80211_auth_type auth_type;
4727         struct key_parse key;
4728         bool local_state_change;
4729
4730         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4731                 return -EINVAL;
4732
4733         if (!info->attrs[NL80211_ATTR_MAC])
4734                 return -EINVAL;
4735
4736         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4737                 return -EINVAL;
4738
4739         if (!info->attrs[NL80211_ATTR_SSID])
4740                 return -EINVAL;
4741
4742         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4743                 return -EINVAL;
4744
4745         err = nl80211_parse_key(info, &key);
4746         if (err)
4747                 return err;
4748
4749         if (key.idx >= 0) {
4750                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4751                         return -EINVAL;
4752                 if (!key.p.key || !key.p.key_len)
4753                         return -EINVAL;
4754                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4755                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4756                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4757                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4758                         return -EINVAL;
4759                 if (key.idx > 4)
4760                         return -EINVAL;
4761         } else {
4762                 key.p.key_len = 0;
4763                 key.p.key = NULL;
4764         }
4765
4766         if (key.idx >= 0) {
4767                 int i;
4768                 bool ok = false;
4769                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4770                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4771                                 ok = true;
4772                                 break;
4773                         }
4774                 }
4775                 if (!ok)
4776                         return -EINVAL;
4777         }
4778
4779         if (!rdev->ops->auth)
4780                 return -EOPNOTSUPP;
4781
4782         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4783             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4784                 return -EOPNOTSUPP;
4785
4786         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4787         chan = ieee80211_get_channel(&rdev->wiphy,
4788                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4789         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4790                 return -EINVAL;
4791
4792         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4793         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4794
4795         if (info->attrs[NL80211_ATTR_IE]) {
4796                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4797                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4798         }
4799
4800         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4801         if (!nl80211_valid_auth_type(auth_type))
4802                 return -EINVAL;
4803
4804         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4805
4806         /*
4807          * Since we no longer track auth state, ignore
4808          * requests to only change local state.
4809          */
4810         if (local_state_change)
4811                 return 0;
4812
4813         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4814                                   ssid, ssid_len, ie, ie_len,
4815                                   key.p.key, key.p.key_len, key.idx);
4816 }
4817
4818 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4819                                    struct genl_info *info,
4820                                    struct cfg80211_crypto_settings *settings,
4821                                    int cipher_limit)
4822 {
4823         memset(settings, 0, sizeof(*settings));
4824
4825         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4826
4827         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4828                 u16 proto;
4829                 proto = nla_get_u16(
4830                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4831                 settings->control_port_ethertype = cpu_to_be16(proto);
4832                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4833                     proto != ETH_P_PAE)
4834                         return -EINVAL;
4835                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4836                         settings->control_port_no_encrypt = true;
4837         } else
4838                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4839
4840         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4841                 void *data;
4842                 int len, i;
4843
4844                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4845                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4846                 settings->n_ciphers_pairwise = len / sizeof(u32);
4847
4848                 if (len % sizeof(u32))
4849                         return -EINVAL;
4850
4851                 if (settings->n_ciphers_pairwise > cipher_limit)
4852                         return -EINVAL;
4853
4854                 memcpy(settings->ciphers_pairwise, data, len);
4855
4856                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4857                         if (!cfg80211_supported_cipher_suite(
4858                                         &rdev->wiphy,
4859                                         settings->ciphers_pairwise[i]))
4860                                 return -EINVAL;
4861         }
4862
4863         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4864                 settings->cipher_group =
4865                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4866                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4867                                                      settings->cipher_group))
4868                         return -EINVAL;
4869         }
4870
4871         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4872                 settings->wpa_versions =
4873                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4874                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4875                         return -EINVAL;
4876         }
4877
4878         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4879                 void *data;
4880                 int len;
4881
4882                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4883                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4884                 settings->n_akm_suites = len / sizeof(u32);
4885
4886                 if (len % sizeof(u32))
4887                         return -EINVAL;
4888
4889                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4890                         return -EINVAL;
4891
4892                 memcpy(settings->akm_suites, data, len);
4893         }
4894
4895         return 0;
4896 }
4897
4898 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4899 {
4900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4901         struct net_device *dev = info->user_ptr[1];
4902         struct cfg80211_crypto_settings crypto;
4903         struct ieee80211_channel *chan;
4904         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4905         int err, ssid_len, ie_len = 0;
4906         bool use_mfp = false;
4907         u32 flags = 0;
4908         struct ieee80211_ht_cap *ht_capa = NULL;
4909         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4910
4911         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4912                 return -EINVAL;
4913
4914         if (!info->attrs[NL80211_ATTR_MAC] ||
4915             !info->attrs[NL80211_ATTR_SSID] ||
4916             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4917                 return -EINVAL;
4918
4919         if (!rdev->ops->assoc)
4920                 return -EOPNOTSUPP;
4921
4922         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4923             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4924                 return -EOPNOTSUPP;
4925
4926         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4927
4928         chan = ieee80211_get_channel(&rdev->wiphy,
4929                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4930         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4931                 return -EINVAL;
4932
4933         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4934         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4935
4936         if (info->attrs[NL80211_ATTR_IE]) {
4937                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4938                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4939         }
4940
4941         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4942                 enum nl80211_mfp mfp =
4943                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4944                 if (mfp == NL80211_MFP_REQUIRED)
4945                         use_mfp = true;
4946                 else if (mfp != NL80211_MFP_NO)
4947                         return -EINVAL;
4948         }
4949
4950         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4951                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4952
4953         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4954                 flags |= ASSOC_REQ_DISABLE_HT;
4955
4956         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4957                 ht_capa_mask =
4958                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4959
4960         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4961                 if (!ht_capa_mask)
4962                         return -EINVAL;
4963                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4964         }
4965
4966         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4967         if (!err)
4968                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4969                                           ssid, ssid_len, ie, ie_len, use_mfp,
4970                                           &crypto, flags, ht_capa,
4971                                           ht_capa_mask);
4972
4973         return err;
4974 }
4975
4976 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4977 {
4978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4979         struct net_device *dev = info->user_ptr[1];
4980         const u8 *ie = NULL, *bssid;
4981         int ie_len = 0;
4982         u16 reason_code;
4983         bool local_state_change;
4984
4985         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4986                 return -EINVAL;
4987
4988         if (!info->attrs[NL80211_ATTR_MAC])
4989                 return -EINVAL;
4990
4991         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4992                 return -EINVAL;
4993
4994         if (!rdev->ops->deauth)
4995                 return -EOPNOTSUPP;
4996
4997         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4998             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4999                 return -EOPNOTSUPP;
5000
5001         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5002
5003         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5004         if (reason_code == 0) {
5005                 /* Reason Code 0 is reserved */
5006                 return -EINVAL;
5007         }
5008
5009         if (info->attrs[NL80211_ATTR_IE]) {
5010                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5011                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5012         }
5013
5014         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5015
5016         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5017                                     local_state_change);
5018 }
5019
5020 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5021 {
5022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5023         struct net_device *dev = info->user_ptr[1];
5024         const u8 *ie = NULL, *bssid;
5025         int ie_len = 0;
5026         u16 reason_code;
5027         bool local_state_change;
5028
5029         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5030                 return -EINVAL;
5031
5032         if (!info->attrs[NL80211_ATTR_MAC])
5033                 return -EINVAL;
5034
5035         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5036                 return -EINVAL;
5037
5038         if (!rdev->ops->disassoc)
5039                 return -EOPNOTSUPP;
5040
5041         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5042             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5043                 return -EOPNOTSUPP;
5044
5045         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5046
5047         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5048         if (reason_code == 0) {
5049                 /* Reason Code 0 is reserved */
5050                 return -EINVAL;
5051         }
5052
5053         if (info->attrs[NL80211_ATTR_IE]) {
5054                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5055                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5056         }
5057
5058         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5059
5060         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5061                                       local_state_change);
5062 }
5063
5064 static bool
5065 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5066                          int mcast_rate[IEEE80211_NUM_BANDS],
5067                          int rateval)
5068 {
5069         struct wiphy *wiphy = &rdev->wiphy;
5070         bool found = false;
5071         int band, i;
5072
5073         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5074                 struct ieee80211_supported_band *sband;
5075
5076                 sband = wiphy->bands[band];
5077                 if (!sband)
5078                         continue;
5079
5080                 for (i = 0; i < sband->n_bitrates; i++) {
5081                         if (sband->bitrates[i].bitrate == rateval) {
5082                                 mcast_rate[band] = i + 1;
5083                                 found = true;
5084                                 break;
5085                         }
5086                 }
5087         }
5088
5089         return found;
5090 }
5091
5092 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5093 {
5094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5095         struct net_device *dev = info->user_ptr[1];
5096         struct cfg80211_ibss_params ibss;
5097         struct wiphy *wiphy;
5098         struct cfg80211_cached_keys *connkeys = NULL;
5099         int err;
5100
5101         memset(&ibss, 0, sizeof(ibss));
5102
5103         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5104                 return -EINVAL;
5105
5106         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5107             !info->attrs[NL80211_ATTR_SSID] ||
5108             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5109                 return -EINVAL;
5110
5111         ibss.beacon_interval = 100;
5112
5113         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5114                 ibss.beacon_interval =
5115                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5116                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5117                         return -EINVAL;
5118         }
5119
5120         if (!rdev->ops->join_ibss)
5121                 return -EOPNOTSUPP;
5122
5123         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5124                 return -EOPNOTSUPP;
5125
5126         wiphy = &rdev->wiphy;
5127
5128         if (info->attrs[NL80211_ATTR_MAC]) {
5129                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5130
5131                 if (!is_valid_ether_addr(ibss.bssid))
5132                         return -EINVAL;
5133         }
5134         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5135         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5136
5137         if (info->attrs[NL80211_ATTR_IE]) {
5138                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5139                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5140         }
5141
5142         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5143                 enum nl80211_channel_type channel_type;
5144
5145                 if (!nl80211_valid_channel_type(info, &channel_type))
5146                         return -EINVAL;
5147
5148                 if (channel_type != NL80211_CHAN_NO_HT &&
5149                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5150                         return -EINVAL;
5151
5152                 ibss.channel_type = channel_type;
5153         } else {
5154                 ibss.channel_type = NL80211_CHAN_NO_HT;
5155         }
5156
5157         ibss.channel = rdev_freq_to_chan(rdev,
5158                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5159                 ibss.channel_type);
5160         if (!ibss.channel ||
5161             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5162             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5163                 return -EINVAL;
5164
5165         /* Both channels should be able to initiate communication */
5166         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5167              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5168             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5169                                           ibss.channel_type))
5170                 return -EINVAL;
5171
5172         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5173         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5174
5175         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5176                 u8 *rates =
5177                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5178                 int n_rates =
5179                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5180                 struct ieee80211_supported_band *sband =
5181                         wiphy->bands[ibss.channel->band];
5182
5183                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5184                                              &ibss.basic_rates);
5185                 if (err)
5186                         return err;
5187         }
5188
5189         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5190             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5191                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5192                 return -EINVAL;
5193
5194         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5195                 connkeys = nl80211_parse_connkeys(rdev,
5196                                         info->attrs[NL80211_ATTR_KEYS]);
5197                 if (IS_ERR(connkeys))
5198                         return PTR_ERR(connkeys);
5199         }
5200
5201         ibss.control_port =
5202                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5203
5204         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5205         if (err)
5206                 kfree(connkeys);
5207         return err;
5208 }
5209
5210 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5211 {
5212         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5213         struct net_device *dev = info->user_ptr[1];
5214
5215         if (!rdev->ops->leave_ibss)
5216                 return -EOPNOTSUPP;
5217
5218         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5219                 return -EOPNOTSUPP;
5220
5221         return cfg80211_leave_ibss(rdev, dev, false);
5222 }
5223
5224 #ifdef CONFIG_NL80211_TESTMODE
5225 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5226         .name = "testmode",
5227 };
5228
5229 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5230 {
5231         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5232         int err;
5233
5234         if (!info->attrs[NL80211_ATTR_TESTDATA])
5235                 return -EINVAL;
5236
5237         err = -EOPNOTSUPP;
5238         if (rdev->ops->testmode_cmd) {
5239                 rdev->testmode_info = info;
5240                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5241                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5242                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5243                 rdev->testmode_info = NULL;
5244         }
5245
5246         return err;
5247 }
5248
5249 static int nl80211_testmode_dump(struct sk_buff *skb,
5250                                  struct netlink_callback *cb)
5251 {
5252         struct cfg80211_registered_device *rdev;
5253         int err;
5254         long phy_idx;
5255         void *data = NULL;
5256         int data_len = 0;
5257
5258         if (cb->args[0]) {
5259                 /*
5260                  * 0 is a valid index, but not valid for args[0],
5261                  * so we need to offset by 1.
5262                  */
5263                 phy_idx = cb->args[0] - 1;
5264         } else {
5265                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5266                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5267                                   nl80211_policy);
5268                 if (err)
5269                         return err;
5270
5271                 mutex_lock(&cfg80211_mutex);
5272                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5273                                                   nl80211_fam.attrbuf);
5274                 if (IS_ERR(rdev)) {
5275                         mutex_unlock(&cfg80211_mutex);
5276                         return PTR_ERR(rdev);
5277                 }
5278                 phy_idx = rdev->wiphy_idx;
5279                 rdev = NULL;
5280                 mutex_unlock(&cfg80211_mutex);
5281
5282                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5283                         cb->args[1] =
5284                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5285         }
5286
5287         if (cb->args[1]) {
5288                 data = nla_data((void *)cb->args[1]);
5289                 data_len = nla_len((void *)cb->args[1]);
5290         }
5291
5292         mutex_lock(&cfg80211_mutex);
5293         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5294         if (!rdev) {
5295                 mutex_unlock(&cfg80211_mutex);
5296                 return -ENOENT;
5297         }
5298         cfg80211_lock_rdev(rdev);
5299         mutex_unlock(&cfg80211_mutex);
5300
5301         if (!rdev->ops->testmode_dump) {
5302                 err = -EOPNOTSUPP;
5303                 goto out_err;
5304         }
5305
5306         while (1) {
5307                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5308                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5309                                            NL80211_CMD_TESTMODE);
5310                 struct nlattr *tmdata;
5311
5312                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5313                         genlmsg_cancel(skb, hdr);
5314                         break;
5315                 }
5316
5317                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5318                 if (!tmdata) {
5319                         genlmsg_cancel(skb, hdr);
5320                         break;
5321                 }
5322                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5323                                                data, data_len);
5324                 nla_nest_end(skb, tmdata);
5325
5326                 if (err == -ENOBUFS || err == -ENOENT) {
5327                         genlmsg_cancel(skb, hdr);
5328                         break;
5329                 } else if (err) {
5330                         genlmsg_cancel(skb, hdr);
5331                         goto out_err;
5332                 }
5333
5334                 genlmsg_end(skb, hdr);
5335         }
5336
5337         err = skb->len;
5338         /* see above */
5339         cb->args[0] = phy_idx + 1;
5340  out_err:
5341         cfg80211_unlock_rdev(rdev);
5342         return err;
5343 }
5344
5345 static struct sk_buff *
5346 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5347                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5348 {
5349         struct sk_buff *skb;
5350         void *hdr;
5351         struct nlattr *data;
5352
5353         skb = nlmsg_new(approxlen + 100, gfp);
5354         if (!skb)
5355                 return NULL;
5356
5357         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5358         if (!hdr) {
5359                 kfree_skb(skb);
5360                 return NULL;
5361         }
5362
5363         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5364                 goto nla_put_failure;
5365         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5366
5367         ((void **)skb->cb)[0] = rdev;
5368         ((void **)skb->cb)[1] = hdr;
5369         ((void **)skb->cb)[2] = data;
5370
5371         return skb;
5372
5373  nla_put_failure:
5374         kfree_skb(skb);
5375         return NULL;
5376 }
5377
5378 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5379                                                   int approxlen)
5380 {
5381         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5382
5383         if (WARN_ON(!rdev->testmode_info))
5384                 return NULL;
5385
5386         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5387                                 rdev->testmode_info->snd_pid,
5388                                 rdev->testmode_info->snd_seq,
5389                                 GFP_KERNEL);
5390 }
5391 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5392
5393 int cfg80211_testmode_reply(struct sk_buff *skb)
5394 {
5395         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5396         void *hdr = ((void **)skb->cb)[1];
5397         struct nlattr *data = ((void **)skb->cb)[2];
5398
5399         if (WARN_ON(!rdev->testmode_info)) {
5400                 kfree_skb(skb);
5401                 return -EINVAL;
5402         }
5403
5404         nla_nest_end(skb, data);
5405         genlmsg_end(skb, hdr);
5406         return genlmsg_reply(skb, rdev->testmode_info);
5407 }
5408 EXPORT_SYMBOL(cfg80211_testmode_reply);
5409
5410 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5411                                                   int approxlen, gfp_t gfp)
5412 {
5413         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5414
5415         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5416 }
5417 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5418
5419 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5420 {
5421         void *hdr = ((void **)skb->cb)[1];
5422         struct nlattr *data = ((void **)skb->cb)[2];
5423
5424         nla_nest_end(skb, data);
5425         genlmsg_end(skb, hdr);
5426         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5427 }
5428 EXPORT_SYMBOL(cfg80211_testmode_event);
5429 #endif
5430
5431 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5432 {
5433         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5434         struct net_device *dev = info->user_ptr[1];
5435         struct cfg80211_connect_params connect;
5436         struct wiphy *wiphy;
5437         struct cfg80211_cached_keys *connkeys = NULL;
5438         int err;
5439
5440         memset(&connect, 0, sizeof(connect));
5441
5442         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5443                 return -EINVAL;
5444
5445         if (!info->attrs[NL80211_ATTR_SSID] ||
5446             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5447                 return -EINVAL;
5448
5449         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5450                 connect.auth_type =
5451                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5452                 if (!nl80211_valid_auth_type(connect.auth_type))
5453                         return -EINVAL;
5454         } else
5455                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5456
5457         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5458
5459         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5460                                       NL80211_MAX_NR_CIPHER_SUITES);
5461         if (err)
5462                 return err;
5463
5464         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5465             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5466                 return -EOPNOTSUPP;
5467
5468         wiphy = &rdev->wiphy;
5469
5470         connect.bg_scan_period = -1;
5471         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5472                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5473                 connect.bg_scan_period =
5474                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5475         }
5476
5477         if (info->attrs[NL80211_ATTR_MAC])
5478                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5479         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5480         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5481
5482         if (info->attrs[NL80211_ATTR_IE]) {
5483                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5484                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5485         }
5486
5487         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5488                 connect.channel =
5489                         ieee80211_get_channel(wiphy,
5490                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5491                 if (!connect.channel ||
5492                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5493                         return -EINVAL;
5494         }
5495
5496         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5497                 connkeys = nl80211_parse_connkeys(rdev,
5498                                         info->attrs[NL80211_ATTR_KEYS]);
5499                 if (IS_ERR(connkeys))
5500                         return PTR_ERR(connkeys);
5501         }
5502
5503         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5504                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5505
5506         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5507                 memcpy(&connect.ht_capa_mask,
5508                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5509                        sizeof(connect.ht_capa_mask));
5510
5511         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5512                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5513                         return -EINVAL;
5514                 memcpy(&connect.ht_capa,
5515                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5516                        sizeof(connect.ht_capa));
5517         }
5518
5519         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5520         if (err)
5521                 kfree(connkeys);
5522         return err;
5523 }
5524
5525 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5526 {
5527         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5528         struct net_device *dev = info->user_ptr[1];
5529         u16 reason;
5530
5531         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5532                 reason = WLAN_REASON_DEAUTH_LEAVING;
5533         else
5534                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5535
5536         if (reason == 0)
5537                 return -EINVAL;
5538
5539         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5540             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5541                 return -EOPNOTSUPP;
5542
5543         return cfg80211_disconnect(rdev, dev, reason, true);
5544 }
5545
5546 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5547 {
5548         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5549         struct net *net;
5550         int err;
5551         u32 pid;
5552
5553         if (!info->attrs[NL80211_ATTR_PID])
5554                 return -EINVAL;
5555
5556         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5557
5558         net = get_net_ns_by_pid(pid);
5559         if (IS_ERR(net))
5560                 return PTR_ERR(net);
5561
5562         err = 0;
5563
5564         /* check if anything to do */
5565         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5566                 err = cfg80211_switch_netns(rdev, net);
5567
5568         put_net(net);
5569         return err;
5570 }
5571
5572 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5573 {
5574         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5575         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5576                         struct cfg80211_pmksa *pmksa) = NULL;
5577         struct net_device *dev = info->user_ptr[1];
5578         struct cfg80211_pmksa pmksa;
5579
5580         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5581
5582         if (!info->attrs[NL80211_ATTR_MAC])
5583                 return -EINVAL;
5584
5585         if (!info->attrs[NL80211_ATTR_PMKID])
5586                 return -EINVAL;
5587
5588         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5589         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5590
5591         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5592             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5593                 return -EOPNOTSUPP;
5594
5595         switch (info->genlhdr->cmd) {
5596         case NL80211_CMD_SET_PMKSA:
5597                 rdev_ops = rdev->ops->set_pmksa;
5598                 break;
5599         case NL80211_CMD_DEL_PMKSA:
5600                 rdev_ops = rdev->ops->del_pmksa;
5601                 break;
5602         default:
5603                 WARN_ON(1);
5604                 break;
5605         }
5606
5607         if (!rdev_ops)
5608                 return -EOPNOTSUPP;
5609
5610         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5611 }
5612
5613 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5614 {
5615         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5616         struct net_device *dev = info->user_ptr[1];
5617
5618         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5619             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5620                 return -EOPNOTSUPP;
5621
5622         if (!rdev->ops->flush_pmksa)
5623                 return -EOPNOTSUPP;
5624
5625         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5626 }
5627
5628 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5629 {
5630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5631         struct net_device *dev = info->user_ptr[1];
5632         u8 action_code, dialog_token;
5633         u16 status_code;
5634         u8 *peer;
5635
5636         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5637             !rdev->ops->tdls_mgmt)
5638                 return -EOPNOTSUPP;
5639
5640         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5641             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5642             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5643             !info->attrs[NL80211_ATTR_IE] ||
5644             !info->attrs[NL80211_ATTR_MAC])
5645                 return -EINVAL;
5646
5647         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5648         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5649         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5650         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5651
5652         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5653                                     dialog_token, status_code,
5654                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5655                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5656 }
5657
5658 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5659 {
5660         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5661         struct net_device *dev = info->user_ptr[1];
5662         enum nl80211_tdls_operation operation;
5663         u8 *peer;
5664
5665         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5666             !rdev->ops->tdls_oper)
5667                 return -EOPNOTSUPP;
5668
5669         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5670             !info->attrs[NL80211_ATTR_MAC])
5671                 return -EINVAL;
5672
5673         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5674         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5675
5676         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5677 }
5678
5679 static int nl80211_remain_on_channel(struct sk_buff *skb,
5680                                      struct genl_info *info)
5681 {
5682         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5683         struct net_device *dev = info->user_ptr[1];
5684         struct ieee80211_channel *chan;
5685         struct sk_buff *msg;
5686         void *hdr;
5687         u64 cookie;
5688         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5689         u32 freq, duration;
5690         int err;
5691
5692         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5693             !info->attrs[NL80211_ATTR_DURATION])
5694                 return -EINVAL;
5695
5696         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5697
5698         if (!rdev->ops->remain_on_channel ||
5699             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5700                 return -EOPNOTSUPP;
5701
5702         /*
5703          * We should be on that channel for at least a minimum amount of
5704          * time (10ms) but no longer than the driver supports.
5705          */
5706         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5707             duration > rdev->wiphy.max_remain_on_channel_duration)
5708                 return -EINVAL;
5709
5710         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5711             !nl80211_valid_channel_type(info, &channel_type))
5712                 return -EINVAL;
5713
5714         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5715         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5716         if (chan == NULL)
5717                 return -EINVAL;
5718
5719         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5720         if (!msg)
5721                 return -ENOMEM;
5722
5723         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5724                              NL80211_CMD_REMAIN_ON_CHANNEL);
5725
5726         if (IS_ERR(hdr)) {
5727                 err = PTR_ERR(hdr);
5728                 goto free_msg;
5729         }
5730
5731         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5732                                            channel_type, duration, &cookie);
5733
5734         if (err)
5735                 goto free_msg;
5736
5737         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5738                 goto nla_put_failure;
5739
5740         genlmsg_end(msg, hdr);
5741
5742         return genlmsg_reply(msg, info);
5743
5744  nla_put_failure:
5745         err = -ENOBUFS;
5746  free_msg:
5747         nlmsg_free(msg);
5748         return err;
5749 }
5750
5751 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5752                                             struct genl_info *info)
5753 {
5754         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5755         struct net_device *dev = info->user_ptr[1];
5756         u64 cookie;
5757
5758         if (!info->attrs[NL80211_ATTR_COOKIE])
5759                 return -EINVAL;
5760
5761         if (!rdev->ops->cancel_remain_on_channel)
5762                 return -EOPNOTSUPP;
5763
5764         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5765
5766         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5767 }
5768
5769 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5770                            u8 *rates, u8 rates_len)
5771 {
5772         u8 i;
5773         u32 mask = 0;
5774
5775         for (i = 0; i < rates_len; i++) {
5776                 int rate = (rates[i] & 0x7f) * 5;
5777                 int ridx;
5778                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5779                         struct ieee80211_rate *srate =
5780                                 &sband->bitrates[ridx];
5781                         if (rate == srate->bitrate) {
5782                                 mask |= 1 << ridx;
5783                                 break;
5784                         }
5785                 }
5786                 if (ridx == sband->n_bitrates)
5787                         return 0; /* rate not found */
5788         }
5789
5790         return mask;
5791 }
5792
5793 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5794                                u8 *rates, u8 rates_len,
5795                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5796 {
5797         u8 i;
5798
5799         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5800
5801         for (i = 0; i < rates_len; i++) {
5802                 int ridx, rbit;
5803
5804                 ridx = rates[i] / 8;
5805                 rbit = BIT(rates[i] % 8);
5806
5807                 /* check validity */
5808                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5809                         return false;
5810
5811                 /* check availability */
5812                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5813                         mcs[ridx] |= rbit;
5814                 else
5815                         return false;
5816         }
5817
5818         return true;
5819 }
5820
5821 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5822         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5823                                     .len = NL80211_MAX_SUPP_RATES },
5824         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5825                                  .len = NL80211_MAX_SUPP_HT_RATES },
5826 };
5827
5828 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5829                                        struct genl_info *info)
5830 {
5831         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5833         struct cfg80211_bitrate_mask mask;
5834         int rem, i;
5835         struct net_device *dev = info->user_ptr[1];
5836         struct nlattr *tx_rates;
5837         struct ieee80211_supported_band *sband;
5838
5839         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5840                 return -EINVAL;
5841
5842         if (!rdev->ops->set_bitrate_mask)
5843                 return -EOPNOTSUPP;
5844
5845         memset(&mask, 0, sizeof(mask));
5846         /* Default to all rates enabled */
5847         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5848                 sband = rdev->wiphy.bands[i];
5849                 mask.control[i].legacy =
5850                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5851                 if (sband)
5852                         memcpy(mask.control[i].mcs,
5853                                sband->ht_cap.mcs.rx_mask,
5854                                sizeof(mask.control[i].mcs));
5855                 else
5856                         memset(mask.control[i].mcs, 0,
5857                                sizeof(mask.control[i].mcs));
5858         }
5859
5860         /*
5861          * The nested attribute uses enum nl80211_band as the index. This maps
5862          * directly to the enum ieee80211_band values used in cfg80211.
5863          */
5864         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5865         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5866         {
5867                 enum ieee80211_band band = nla_type(tx_rates);
5868                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5869                         return -EINVAL;
5870                 sband = rdev->wiphy.bands[band];
5871                 if (sband == NULL)
5872                         return -EINVAL;
5873                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5874                           nla_len(tx_rates), nl80211_txattr_policy);
5875                 if (tb[NL80211_TXRATE_LEGACY]) {
5876                         mask.control[band].legacy = rateset_to_mask(
5877                                 sband,
5878                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5879                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5880                         if ((mask.control[band].legacy == 0) &&
5881                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5882                                 return -EINVAL;
5883                 }
5884                 if (tb[NL80211_TXRATE_MCS]) {
5885                         if (!ht_rateset_to_mask(
5886                                         sband,
5887                                         nla_data(tb[NL80211_TXRATE_MCS]),
5888                                         nla_len(tb[NL80211_TXRATE_MCS]),
5889                                         mask.control[band].mcs))
5890                                 return -EINVAL;
5891                 }
5892
5893                 if (mask.control[band].legacy == 0) {
5894                         /* don't allow empty legacy rates if HT
5895                          * is not even supported. */
5896                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5897                                 return -EINVAL;
5898
5899                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5900                                 if (mask.control[band].mcs[i])
5901                                         break;
5902
5903                         /* legacy and mcs rates may not be both empty */
5904                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5905                                 return -EINVAL;
5906                 }
5907         }
5908
5909         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5910 }
5911
5912 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5913 {
5914         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5915         struct net_device *dev = info->user_ptr[1];
5916         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5917
5918         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5919                 return -EINVAL;
5920
5921         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5922                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5923
5924         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5925             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5926             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5927             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5928             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5929             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5930             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5931                 return -EOPNOTSUPP;
5932
5933         /* not much point in registering if we can't reply */
5934         if (!rdev->ops->mgmt_tx)
5935                 return -EOPNOTSUPP;
5936
5937         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5938                         frame_type,
5939                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5940                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5941 }
5942
5943 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5944 {
5945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5946         struct net_device *dev = info->user_ptr[1];
5947         struct ieee80211_channel *chan;
5948         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5949         bool channel_type_valid = false;
5950         u32 freq;
5951         int err;
5952         void *hdr = NULL;
5953         u64 cookie;
5954         struct sk_buff *msg = NULL;
5955         unsigned int wait = 0;
5956         bool offchan, no_cck, dont_wait_for_ack;
5957
5958         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5959
5960         if (!info->attrs[NL80211_ATTR_FRAME] ||
5961             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5962                 return -EINVAL;
5963
5964         if (!rdev->ops->mgmt_tx)
5965                 return -EOPNOTSUPP;
5966
5967         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5968             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5969             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5970             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5971             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5972             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5973             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5974                 return -EOPNOTSUPP;
5975
5976         if (info->attrs[NL80211_ATTR_DURATION]) {
5977                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5978                         return -EINVAL;
5979                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5980
5981                 /*
5982                  * We should wait on the channel for at least a minimum amount
5983                  * of time (10ms) but no longer than the driver supports.
5984                  */
5985                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5986                     wait > rdev->wiphy.max_remain_on_channel_duration)
5987                         return -EINVAL;
5988
5989         }
5990
5991         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5992                 if (!nl80211_valid_channel_type(info, &channel_type))
5993                         return -EINVAL;
5994                 channel_type_valid = true;
5995         }
5996
5997         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5998
5999         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6000                 return -EINVAL;
6001
6002         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6003
6004         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6005         chan = rdev_freq_to_chan(rdev, freq, channel_type);
6006         if (chan == NULL)
6007                 return -EINVAL;
6008
6009         if (!dont_wait_for_ack) {
6010                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6011                 if (!msg)
6012                         return -ENOMEM;
6013
6014                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6015                                      NL80211_CMD_FRAME);
6016
6017                 if (IS_ERR(hdr)) {
6018                         err = PTR_ERR(hdr);
6019                         goto free_msg;
6020                 }
6021         }
6022
6023         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
6024                                     channel_type_valid, wait,
6025                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6026                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6027                                     no_cck, dont_wait_for_ack, &cookie);
6028         if (err)
6029                 goto free_msg;
6030
6031         if (msg) {
6032                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6033                         goto nla_put_failure;
6034
6035                 genlmsg_end(msg, hdr);
6036                 return genlmsg_reply(msg, info);
6037         }
6038
6039         return 0;
6040
6041  nla_put_failure:
6042         err = -ENOBUFS;
6043  free_msg:
6044         nlmsg_free(msg);
6045         return err;
6046 }
6047
6048 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6049 {
6050         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6051         struct net_device *dev = info->user_ptr[1];
6052         u64 cookie;
6053
6054         if (!info->attrs[NL80211_ATTR_COOKIE])
6055                 return -EINVAL;
6056
6057         if (!rdev->ops->mgmt_tx_cancel_wait)
6058                 return -EOPNOTSUPP;
6059
6060         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6061             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6062             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6063             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6064             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6065             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6066                 return -EOPNOTSUPP;
6067
6068         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6069
6070         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6071 }
6072
6073 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6074 {
6075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6076         struct wireless_dev *wdev;
6077         struct net_device *dev = info->user_ptr[1];
6078         u8 ps_state;
6079         bool state;
6080         int err;
6081
6082         if (!info->attrs[NL80211_ATTR_PS_STATE])
6083                 return -EINVAL;
6084
6085         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6086
6087         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6088                 return -EINVAL;
6089
6090         wdev = dev->ieee80211_ptr;
6091
6092         if (!rdev->ops->set_power_mgmt)
6093                 return -EOPNOTSUPP;
6094
6095         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6096
6097         if (state == wdev->ps)
6098                 return 0;
6099
6100         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6101                                         wdev->ps_timeout);
6102         if (!err)
6103                 wdev->ps = state;
6104         return err;
6105 }
6106
6107 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6108 {
6109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6110         enum nl80211_ps_state ps_state;
6111         struct wireless_dev *wdev;
6112         struct net_device *dev = info->user_ptr[1];
6113         struct sk_buff *msg;
6114         void *hdr;
6115         int err;
6116
6117         wdev = dev->ieee80211_ptr;
6118
6119         if (!rdev->ops->set_power_mgmt)
6120                 return -EOPNOTSUPP;
6121
6122         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6123         if (!msg)
6124                 return -ENOMEM;
6125
6126         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6127                              NL80211_CMD_GET_POWER_SAVE);
6128         if (!hdr) {
6129                 err = -ENOBUFS;
6130                 goto free_msg;
6131         }
6132
6133         if (wdev->ps)
6134                 ps_state = NL80211_PS_ENABLED;
6135         else
6136                 ps_state = NL80211_PS_DISABLED;
6137
6138         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6139                 goto nla_put_failure;
6140
6141         genlmsg_end(msg, hdr);
6142         return genlmsg_reply(msg, info);
6143
6144  nla_put_failure:
6145         err = -ENOBUFS;
6146  free_msg:
6147         nlmsg_free(msg);
6148         return err;
6149 }
6150
6151 static struct nla_policy
6152 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6153         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6154         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6155         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6156 };
6157
6158 static int nl80211_set_cqm_rssi(struct genl_info *info,
6159                                 s32 threshold, u32 hysteresis)
6160 {
6161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6162         struct wireless_dev *wdev;
6163         struct net_device *dev = info->user_ptr[1];
6164
6165         if (threshold > 0)
6166                 return -EINVAL;
6167
6168         wdev = dev->ieee80211_ptr;
6169
6170         if (!rdev->ops->set_cqm_rssi_config)
6171                 return -EOPNOTSUPP;
6172
6173         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6174             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6175                 return -EOPNOTSUPP;
6176
6177         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6178                                               threshold, hysteresis);
6179 }
6180
6181 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6182 {
6183         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6184         struct nlattr *cqm;
6185         int err;
6186
6187         cqm = info->attrs[NL80211_ATTR_CQM];
6188         if (!cqm) {
6189                 err = -EINVAL;
6190                 goto out;
6191         }
6192
6193         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6194                                nl80211_attr_cqm_policy);
6195         if (err)
6196                 goto out;
6197
6198         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6199             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6200                 s32 threshold;
6201                 u32 hysteresis;
6202                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6203                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6204                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6205         } else
6206                 err = -EINVAL;
6207
6208 out:
6209         return err;
6210 }
6211
6212 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6213 {
6214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6215         struct net_device *dev = info->user_ptr[1];
6216         struct mesh_config cfg;
6217         struct mesh_setup setup;
6218         int err;
6219
6220         /* start with default */
6221         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6222         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6223
6224         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6225                 /* and parse parameters if given */
6226                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6227                 if (err)
6228                         return err;
6229         }
6230
6231         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6232             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6233                 return -EINVAL;
6234
6235         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6236         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6237
6238         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6239             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6240                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6241                         return -EINVAL;
6242
6243         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6244                 /* parse additional setup parameters if given */
6245                 err = nl80211_parse_mesh_setup(info, &setup);
6246                 if (err)
6247                         return err;
6248         }
6249
6250         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6251                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6252
6253                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6254                     !nl80211_valid_channel_type(info, &channel_type))
6255                         return -EINVAL;
6256
6257                 setup.channel = rdev_freq_to_chan(rdev,
6258                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6259                         channel_type);
6260                 if (!setup.channel)
6261                         return -EINVAL;
6262                 setup.channel_type = channel_type;
6263         } else {
6264                 /* cfg80211_join_mesh() will sort it out */
6265                 setup.channel = NULL;
6266         }
6267
6268         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6269 }
6270
6271 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6272 {
6273         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6274         struct net_device *dev = info->user_ptr[1];
6275
6276         return cfg80211_leave_mesh(rdev, dev);
6277 }
6278
6279 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6280 {
6281         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6282         struct sk_buff *msg;
6283         void *hdr;
6284
6285         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6286                 return -EOPNOTSUPP;
6287
6288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6289         if (!msg)
6290                 return -ENOMEM;
6291
6292         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6293                              NL80211_CMD_GET_WOWLAN);
6294         if (!hdr)
6295                 goto nla_put_failure;
6296
6297         if (rdev->wowlan) {
6298                 struct nlattr *nl_wowlan;
6299
6300                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6301                 if (!nl_wowlan)
6302                         goto nla_put_failure;
6303
6304                 if ((rdev->wowlan->any &&
6305                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6306                     (rdev->wowlan->disconnect &&
6307                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6308                     (rdev->wowlan->magic_pkt &&
6309                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6310                     (rdev->wowlan->gtk_rekey_failure &&
6311                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6312                     (rdev->wowlan->eap_identity_req &&
6313                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6314                     (rdev->wowlan->four_way_handshake &&
6315                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6316                     (rdev->wowlan->rfkill_release &&
6317                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6318                         goto nla_put_failure;
6319                 if (rdev->wowlan->n_patterns) {
6320                         struct nlattr *nl_pats, *nl_pat;
6321                         int i, pat_len;
6322
6323                         nl_pats = nla_nest_start(msg,
6324                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6325                         if (!nl_pats)
6326                                 goto nla_put_failure;
6327
6328                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6329                                 nl_pat = nla_nest_start(msg, i + 1);
6330                                 if (!nl_pat)
6331                                         goto nla_put_failure;
6332                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6333                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6334                                             DIV_ROUND_UP(pat_len, 8),
6335                                             rdev->wowlan->patterns[i].mask) ||
6336                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6337                                             pat_len,
6338                                             rdev->wowlan->patterns[i].pattern))
6339                                         goto nla_put_failure;
6340                                 nla_nest_end(msg, nl_pat);
6341                         }
6342                         nla_nest_end(msg, nl_pats);
6343                 }
6344
6345                 nla_nest_end(msg, nl_wowlan);
6346         }
6347
6348         genlmsg_end(msg, hdr);
6349         return genlmsg_reply(msg, info);
6350
6351 nla_put_failure:
6352         nlmsg_free(msg);
6353         return -ENOBUFS;
6354 }
6355
6356 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6357 {
6358         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6359         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6360         struct cfg80211_wowlan no_triggers = {};
6361         struct cfg80211_wowlan new_triggers = {};
6362         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6363         int err, i;
6364         bool prev_enabled = rdev->wowlan;
6365
6366         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6367                 return -EOPNOTSUPP;
6368
6369         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6370                 goto no_triggers;
6371
6372         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6373                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6374                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6375                         nl80211_wowlan_policy);
6376         if (err)
6377                 return err;
6378
6379         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6380                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6381                         return -EINVAL;
6382                 new_triggers.any = true;
6383         }
6384
6385         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6386                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6387                         return -EINVAL;
6388                 new_triggers.disconnect = true;
6389         }
6390
6391         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6392                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6393                         return -EINVAL;
6394                 new_triggers.magic_pkt = true;
6395         }
6396
6397         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6398                 return -EINVAL;
6399
6400         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6401                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6402                         return -EINVAL;
6403                 new_triggers.gtk_rekey_failure = true;
6404         }
6405
6406         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6407                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6408                         return -EINVAL;
6409                 new_triggers.eap_identity_req = true;
6410         }
6411
6412         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6413                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6414                         return -EINVAL;
6415                 new_triggers.four_way_handshake = true;
6416         }
6417
6418         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6419                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6420                         return -EINVAL;
6421                 new_triggers.rfkill_release = true;
6422         }
6423
6424         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6425                 struct nlattr *pat;
6426                 int n_patterns = 0;
6427                 int rem, pat_len, mask_len;
6428                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6429
6430                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6431                                     rem)
6432                         n_patterns++;
6433                 if (n_patterns > wowlan->n_patterns)
6434                         return -EINVAL;
6435
6436                 new_triggers.patterns = kcalloc(n_patterns,
6437                                                 sizeof(new_triggers.patterns[0]),
6438                                                 GFP_KERNEL);
6439                 if (!new_triggers.patterns)
6440                         return -ENOMEM;
6441
6442                 new_triggers.n_patterns = n_patterns;
6443                 i = 0;
6444
6445                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6446                                     rem) {
6447                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6448                                   nla_data(pat), nla_len(pat), NULL);
6449                         err = -EINVAL;
6450                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6451                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6452                                 goto error;
6453                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6454                         mask_len = DIV_ROUND_UP(pat_len, 8);
6455                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6456                             mask_len)
6457                                 goto error;
6458                         if (pat_len > wowlan->pattern_max_len ||
6459                             pat_len < wowlan->pattern_min_len)
6460                                 goto error;
6461
6462                         new_triggers.patterns[i].mask =
6463                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6464                         if (!new_triggers.patterns[i].mask) {
6465                                 err = -ENOMEM;
6466                                 goto error;
6467                         }
6468                         new_triggers.patterns[i].pattern =
6469                                 new_triggers.patterns[i].mask + mask_len;
6470                         memcpy(new_triggers.patterns[i].mask,
6471                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6472                                mask_len);
6473                         new_triggers.patterns[i].pattern_len = pat_len;
6474                         memcpy(new_triggers.patterns[i].pattern,
6475                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6476                                pat_len);
6477                         i++;
6478                 }
6479         }
6480
6481         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6482                 struct cfg80211_wowlan *ntrig;
6483                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6484                                 GFP_KERNEL);
6485                 if (!ntrig) {
6486                         err = -ENOMEM;
6487                         goto error;
6488                 }
6489                 cfg80211_rdev_free_wowlan(rdev);
6490                 rdev->wowlan = ntrig;
6491         } else {
6492  no_triggers:
6493                 cfg80211_rdev_free_wowlan(rdev);
6494                 rdev->wowlan = NULL;
6495         }
6496
6497         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6498                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6499
6500         return 0;
6501  error:
6502         for (i = 0; i < new_triggers.n_patterns; i++)
6503                 kfree(new_triggers.patterns[i].mask);
6504         kfree(new_triggers.patterns);
6505         return err;
6506 }
6507
6508 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6509 {
6510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6511         struct net_device *dev = info->user_ptr[1];
6512         struct wireless_dev *wdev = dev->ieee80211_ptr;
6513         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6514         struct cfg80211_gtk_rekey_data rekey_data;
6515         int err;
6516
6517         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6518                 return -EINVAL;
6519
6520         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6521                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6522                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6523                         nl80211_rekey_policy);
6524         if (err)
6525                 return err;
6526
6527         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6528                 return -ERANGE;
6529         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6530                 return -ERANGE;
6531         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6532                 return -ERANGE;
6533
6534         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6535                NL80211_KEK_LEN);
6536         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6537                NL80211_KCK_LEN);
6538         memcpy(rekey_data.replay_ctr,
6539                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6540                NL80211_REPLAY_CTR_LEN);
6541
6542         wdev_lock(wdev);
6543         if (!wdev->current_bss) {
6544                 err = -ENOTCONN;
6545                 goto out;
6546         }
6547
6548         if (!rdev->ops->set_rekey_data) {
6549                 err = -EOPNOTSUPP;
6550                 goto out;
6551         }
6552
6553         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6554  out:
6555         wdev_unlock(wdev);
6556         return err;
6557 }
6558
6559 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6560                                              struct genl_info *info)
6561 {
6562         struct net_device *dev = info->user_ptr[1];
6563         struct wireless_dev *wdev = dev->ieee80211_ptr;
6564
6565         if (wdev->iftype != NL80211_IFTYPE_AP &&
6566             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6567                 return -EINVAL;
6568
6569         if (wdev->ap_unexpected_nlpid)
6570                 return -EBUSY;
6571
6572         wdev->ap_unexpected_nlpid = info->snd_pid;
6573         return 0;
6574 }
6575
6576 static int nl80211_probe_client(struct sk_buff *skb,
6577                                 struct genl_info *info)
6578 {
6579         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6580         struct net_device *dev = info->user_ptr[1];
6581         struct wireless_dev *wdev = dev->ieee80211_ptr;
6582         struct sk_buff *msg;
6583         void *hdr;
6584         const u8 *addr;
6585         u64 cookie;
6586         int err;
6587
6588         if (wdev->iftype != NL80211_IFTYPE_AP &&
6589             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6590                 return -EOPNOTSUPP;
6591
6592         if (!info->attrs[NL80211_ATTR_MAC])
6593                 return -EINVAL;
6594
6595         if (!rdev->ops->probe_client)
6596                 return -EOPNOTSUPP;
6597
6598         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6599         if (!msg)
6600                 return -ENOMEM;
6601
6602         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6603                              NL80211_CMD_PROBE_CLIENT);
6604
6605         if (IS_ERR(hdr)) {
6606                 err = PTR_ERR(hdr);
6607                 goto free_msg;
6608         }
6609
6610         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6611
6612         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6613         if (err)
6614                 goto free_msg;
6615
6616         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6617                 goto nla_put_failure;
6618
6619         genlmsg_end(msg, hdr);
6620
6621         return genlmsg_reply(msg, info);
6622
6623  nla_put_failure:
6624         err = -ENOBUFS;
6625  free_msg:
6626         nlmsg_free(msg);
6627         return err;
6628 }
6629
6630 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6631 {
6632         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6633
6634         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6635                 return -EOPNOTSUPP;
6636
6637         if (rdev->ap_beacons_nlpid)
6638                 return -EBUSY;
6639
6640         rdev->ap_beacons_nlpid = info->snd_pid;
6641
6642         return 0;
6643 }
6644
6645 #define NL80211_FLAG_NEED_WIPHY         0x01
6646 #define NL80211_FLAG_NEED_NETDEV        0x02
6647 #define NL80211_FLAG_NEED_RTNL          0x04
6648 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6649 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6650                                          NL80211_FLAG_CHECK_NETDEV_UP)
6651
6652 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6653                             struct genl_info *info)
6654 {
6655         struct cfg80211_registered_device *rdev;
6656         struct net_device *dev;
6657         int err;
6658         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6659
6660         if (rtnl)
6661                 rtnl_lock();
6662
6663         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6664                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6665                 if (IS_ERR(rdev)) {
6666                         if (rtnl)
6667                                 rtnl_unlock();
6668                         return PTR_ERR(rdev);
6669                 }
6670                 info->user_ptr[0] = rdev;
6671         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6672                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6673                                               &rdev, &dev);
6674                 if (err) {
6675                         if (rtnl)
6676                                 rtnl_unlock();
6677                         return err;
6678                 }
6679                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6680                     !netif_running(dev)) {
6681                         cfg80211_unlock_rdev(rdev);
6682                         dev_put(dev);
6683                         if (rtnl)
6684                                 rtnl_unlock();
6685                         return -ENETDOWN;
6686                 }
6687                 info->user_ptr[0] = rdev;
6688                 info->user_ptr[1] = dev;
6689         }
6690
6691         return 0;
6692 }
6693
6694 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6695                               struct genl_info *info)
6696 {
6697         if (info->user_ptr[0])
6698                 cfg80211_unlock_rdev(info->user_ptr[0]);
6699         if (info->user_ptr[1])
6700                 dev_put(info->user_ptr[1]);
6701         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6702                 rtnl_unlock();
6703 }
6704
6705 static struct genl_ops nl80211_ops[] = {
6706         {
6707                 .cmd = NL80211_CMD_GET_WIPHY,
6708                 .doit = nl80211_get_wiphy,
6709                 .dumpit = nl80211_dump_wiphy,
6710                 .policy = nl80211_policy,
6711                 /* can be retrieved by unprivileged users */
6712                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6713         },
6714         {
6715                 .cmd = NL80211_CMD_SET_WIPHY,
6716                 .doit = nl80211_set_wiphy,
6717                 .policy = nl80211_policy,
6718                 .flags = GENL_ADMIN_PERM,
6719                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6720         },
6721         {
6722                 .cmd = NL80211_CMD_GET_INTERFACE,
6723                 .doit = nl80211_get_interface,
6724                 .dumpit = nl80211_dump_interface,
6725                 .policy = nl80211_policy,
6726                 /* can be retrieved by unprivileged users */
6727                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6728         },
6729         {
6730                 .cmd = NL80211_CMD_SET_INTERFACE,
6731                 .doit = nl80211_set_interface,
6732                 .policy = nl80211_policy,
6733                 .flags = GENL_ADMIN_PERM,
6734                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6735                                   NL80211_FLAG_NEED_RTNL,
6736         },
6737         {
6738                 .cmd = NL80211_CMD_NEW_INTERFACE,
6739                 .doit = nl80211_new_interface,
6740                 .policy = nl80211_policy,
6741                 .flags = GENL_ADMIN_PERM,
6742                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6743                                   NL80211_FLAG_NEED_RTNL,
6744         },
6745         {
6746                 .cmd = NL80211_CMD_DEL_INTERFACE,
6747                 .doit = nl80211_del_interface,
6748                 .policy = nl80211_policy,
6749                 .flags = GENL_ADMIN_PERM,
6750                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6751                                   NL80211_FLAG_NEED_RTNL,
6752         },
6753         {
6754                 .cmd = NL80211_CMD_GET_KEY,
6755                 .doit = nl80211_get_key,
6756                 .policy = nl80211_policy,
6757                 .flags = GENL_ADMIN_PERM,
6758                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6759                                   NL80211_FLAG_NEED_RTNL,
6760         },
6761         {
6762                 .cmd = NL80211_CMD_SET_KEY,
6763                 .doit = nl80211_set_key,
6764                 .policy = nl80211_policy,
6765                 .flags = GENL_ADMIN_PERM,
6766                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6767                                   NL80211_FLAG_NEED_RTNL,
6768         },
6769         {
6770                 .cmd = NL80211_CMD_NEW_KEY,
6771                 .doit = nl80211_new_key,
6772                 .policy = nl80211_policy,
6773                 .flags = GENL_ADMIN_PERM,
6774                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6775                                   NL80211_FLAG_NEED_RTNL,
6776         },
6777         {
6778                 .cmd = NL80211_CMD_DEL_KEY,
6779                 .doit = nl80211_del_key,
6780                 .policy = nl80211_policy,
6781                 .flags = GENL_ADMIN_PERM,
6782                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6783                                   NL80211_FLAG_NEED_RTNL,
6784         },
6785         {
6786                 .cmd = NL80211_CMD_SET_BEACON,
6787                 .policy = nl80211_policy,
6788                 .flags = GENL_ADMIN_PERM,
6789                 .doit = nl80211_set_beacon,
6790                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6791                                   NL80211_FLAG_NEED_RTNL,
6792         },
6793         {
6794                 .cmd = NL80211_CMD_START_AP,
6795                 .policy = nl80211_policy,
6796                 .flags = GENL_ADMIN_PERM,
6797                 .doit = nl80211_start_ap,
6798                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6799                                   NL80211_FLAG_NEED_RTNL,
6800         },
6801         {
6802                 .cmd = NL80211_CMD_STOP_AP,
6803                 .policy = nl80211_policy,
6804                 .flags = GENL_ADMIN_PERM,
6805                 .doit = nl80211_stop_ap,
6806                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6807                                   NL80211_FLAG_NEED_RTNL,
6808         },
6809         {
6810                 .cmd = NL80211_CMD_GET_STATION,
6811                 .doit = nl80211_get_station,
6812                 .dumpit = nl80211_dump_station,
6813                 .policy = nl80211_policy,
6814                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6815                                   NL80211_FLAG_NEED_RTNL,
6816         },
6817         {
6818                 .cmd = NL80211_CMD_SET_STATION,
6819                 .doit = nl80211_set_station,
6820                 .policy = nl80211_policy,
6821                 .flags = GENL_ADMIN_PERM,
6822                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6823                                   NL80211_FLAG_NEED_RTNL,
6824         },
6825         {
6826                 .cmd = NL80211_CMD_NEW_STATION,
6827                 .doit = nl80211_new_station,
6828                 .policy = nl80211_policy,
6829                 .flags = GENL_ADMIN_PERM,
6830                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6831                                   NL80211_FLAG_NEED_RTNL,
6832         },
6833         {
6834                 .cmd = NL80211_CMD_DEL_STATION,
6835                 .doit = nl80211_del_station,
6836                 .policy = nl80211_policy,
6837                 .flags = GENL_ADMIN_PERM,
6838                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6839                                   NL80211_FLAG_NEED_RTNL,
6840         },
6841         {
6842                 .cmd = NL80211_CMD_GET_MPATH,
6843                 .doit = nl80211_get_mpath,
6844                 .dumpit = nl80211_dump_mpath,
6845                 .policy = nl80211_policy,
6846                 .flags = GENL_ADMIN_PERM,
6847                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6848                                   NL80211_FLAG_NEED_RTNL,
6849         },
6850         {
6851                 .cmd = NL80211_CMD_SET_MPATH,
6852                 .doit = nl80211_set_mpath,
6853                 .policy = nl80211_policy,
6854                 .flags = GENL_ADMIN_PERM,
6855                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6856                                   NL80211_FLAG_NEED_RTNL,
6857         },
6858         {
6859                 .cmd = NL80211_CMD_NEW_MPATH,
6860                 .doit = nl80211_new_mpath,
6861                 .policy = nl80211_policy,
6862                 .flags = GENL_ADMIN_PERM,
6863                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6864                                   NL80211_FLAG_NEED_RTNL,
6865         },
6866         {
6867                 .cmd = NL80211_CMD_DEL_MPATH,
6868                 .doit = nl80211_del_mpath,
6869                 .policy = nl80211_policy,
6870                 .flags = GENL_ADMIN_PERM,
6871                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6872                                   NL80211_FLAG_NEED_RTNL,
6873         },
6874         {
6875                 .cmd = NL80211_CMD_SET_BSS,
6876                 .doit = nl80211_set_bss,
6877                 .policy = nl80211_policy,
6878                 .flags = GENL_ADMIN_PERM,
6879                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6880                                   NL80211_FLAG_NEED_RTNL,
6881         },
6882         {
6883                 .cmd = NL80211_CMD_GET_REG,
6884                 .doit = nl80211_get_reg,
6885                 .policy = nl80211_policy,
6886                 /* can be retrieved by unprivileged users */
6887         },
6888         {
6889                 .cmd = NL80211_CMD_SET_REG,
6890                 .doit = nl80211_set_reg,
6891                 .policy = nl80211_policy,
6892                 .flags = GENL_ADMIN_PERM,
6893         },
6894         {
6895                 .cmd = NL80211_CMD_REQ_SET_REG,
6896                 .doit = nl80211_req_set_reg,
6897                 .policy = nl80211_policy,
6898                 .flags = GENL_ADMIN_PERM,
6899         },
6900         {
6901                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6902                 .doit = nl80211_get_mesh_config,
6903                 .policy = nl80211_policy,
6904                 /* can be retrieved by unprivileged users */
6905                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6906                                   NL80211_FLAG_NEED_RTNL,
6907         },
6908         {
6909                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6910                 .doit = nl80211_update_mesh_config,
6911                 .policy = nl80211_policy,
6912                 .flags = GENL_ADMIN_PERM,
6913                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6914                                   NL80211_FLAG_NEED_RTNL,
6915         },
6916         {
6917                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6918                 .doit = nl80211_trigger_scan,
6919                 .policy = nl80211_policy,
6920                 .flags = GENL_ADMIN_PERM,
6921                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6922                                   NL80211_FLAG_NEED_RTNL,
6923         },
6924         {
6925                 .cmd = NL80211_CMD_GET_SCAN,
6926                 .policy = nl80211_policy,
6927                 .dumpit = nl80211_dump_scan,
6928         },
6929         {
6930                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6931                 .doit = nl80211_start_sched_scan,
6932                 .policy = nl80211_policy,
6933                 .flags = GENL_ADMIN_PERM,
6934                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6935                                   NL80211_FLAG_NEED_RTNL,
6936         },
6937         {
6938                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6939                 .doit = nl80211_stop_sched_scan,
6940                 .policy = nl80211_policy,
6941                 .flags = GENL_ADMIN_PERM,
6942                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6943                                   NL80211_FLAG_NEED_RTNL,
6944         },
6945         {
6946                 .cmd = NL80211_CMD_AUTHENTICATE,
6947                 .doit = nl80211_authenticate,
6948                 .policy = nl80211_policy,
6949                 .flags = GENL_ADMIN_PERM,
6950                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6951                                   NL80211_FLAG_NEED_RTNL,
6952         },
6953         {
6954                 .cmd = NL80211_CMD_ASSOCIATE,
6955                 .doit = nl80211_associate,
6956                 .policy = nl80211_policy,
6957                 .flags = GENL_ADMIN_PERM,
6958                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6959                                   NL80211_FLAG_NEED_RTNL,
6960         },
6961         {
6962                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6963                 .doit = nl80211_deauthenticate,
6964                 .policy = nl80211_policy,
6965                 .flags = GENL_ADMIN_PERM,
6966                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6967                                   NL80211_FLAG_NEED_RTNL,
6968         },
6969         {
6970                 .cmd = NL80211_CMD_DISASSOCIATE,
6971                 .doit = nl80211_disassociate,
6972                 .policy = nl80211_policy,
6973                 .flags = GENL_ADMIN_PERM,
6974                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6975                                   NL80211_FLAG_NEED_RTNL,
6976         },
6977         {
6978                 .cmd = NL80211_CMD_JOIN_IBSS,
6979                 .doit = nl80211_join_ibss,
6980                 .policy = nl80211_policy,
6981                 .flags = GENL_ADMIN_PERM,
6982                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6983                                   NL80211_FLAG_NEED_RTNL,
6984         },
6985         {
6986                 .cmd = NL80211_CMD_LEAVE_IBSS,
6987                 .doit = nl80211_leave_ibss,
6988                 .policy = nl80211_policy,
6989                 .flags = GENL_ADMIN_PERM,
6990                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6991                                   NL80211_FLAG_NEED_RTNL,
6992         },
6993 #ifdef CONFIG_NL80211_TESTMODE
6994         {
6995                 .cmd = NL80211_CMD_TESTMODE,
6996                 .doit = nl80211_testmode_do,
6997                 .dumpit = nl80211_testmode_dump,
6998                 .policy = nl80211_policy,
6999                 .flags = GENL_ADMIN_PERM,
7000                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7001                                   NL80211_FLAG_NEED_RTNL,
7002         },
7003 #endif
7004         {
7005                 .cmd = NL80211_CMD_CONNECT,
7006                 .doit = nl80211_connect,
7007                 .policy = nl80211_policy,
7008                 .flags = GENL_ADMIN_PERM,
7009                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7010                                   NL80211_FLAG_NEED_RTNL,
7011         },
7012         {
7013                 .cmd = NL80211_CMD_DISCONNECT,
7014                 .doit = nl80211_disconnect,
7015                 .policy = nl80211_policy,
7016                 .flags = GENL_ADMIN_PERM,
7017                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7018                                   NL80211_FLAG_NEED_RTNL,
7019         },
7020         {
7021                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7022                 .doit = nl80211_wiphy_netns,
7023                 .policy = nl80211_policy,
7024                 .flags = GENL_ADMIN_PERM,
7025                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7026                                   NL80211_FLAG_NEED_RTNL,
7027         },
7028         {
7029                 .cmd = NL80211_CMD_GET_SURVEY,
7030                 .policy = nl80211_policy,
7031                 .dumpit = nl80211_dump_survey,
7032         },
7033         {
7034                 .cmd = NL80211_CMD_SET_PMKSA,
7035                 .doit = nl80211_setdel_pmksa,
7036                 .policy = nl80211_policy,
7037                 .flags = GENL_ADMIN_PERM,
7038                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7039                                   NL80211_FLAG_NEED_RTNL,
7040         },
7041         {
7042                 .cmd = NL80211_CMD_DEL_PMKSA,
7043                 .doit = nl80211_setdel_pmksa,
7044                 .policy = nl80211_policy,
7045                 .flags = GENL_ADMIN_PERM,
7046                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7047                                   NL80211_FLAG_NEED_RTNL,
7048         },
7049         {
7050                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7051                 .doit = nl80211_flush_pmksa,
7052                 .policy = nl80211_policy,
7053                 .flags = GENL_ADMIN_PERM,
7054                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7055                                   NL80211_FLAG_NEED_RTNL,
7056         },
7057         {
7058                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7059                 .doit = nl80211_remain_on_channel,
7060                 .policy = nl80211_policy,
7061                 .flags = GENL_ADMIN_PERM,
7062                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7063                                   NL80211_FLAG_NEED_RTNL,
7064         },
7065         {
7066                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7067                 .doit = nl80211_cancel_remain_on_channel,
7068                 .policy = nl80211_policy,
7069                 .flags = GENL_ADMIN_PERM,
7070                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7071                                   NL80211_FLAG_NEED_RTNL,
7072         },
7073         {
7074                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7075                 .doit = nl80211_set_tx_bitrate_mask,
7076                 .policy = nl80211_policy,
7077                 .flags = GENL_ADMIN_PERM,
7078                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7079                                   NL80211_FLAG_NEED_RTNL,
7080         },
7081         {
7082                 .cmd = NL80211_CMD_REGISTER_FRAME,
7083                 .doit = nl80211_register_mgmt,
7084                 .policy = nl80211_policy,
7085                 .flags = GENL_ADMIN_PERM,
7086                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7087                                   NL80211_FLAG_NEED_RTNL,
7088         },
7089         {
7090                 .cmd = NL80211_CMD_FRAME,
7091                 .doit = nl80211_tx_mgmt,
7092                 .policy = nl80211_policy,
7093                 .flags = GENL_ADMIN_PERM,
7094                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7095                                   NL80211_FLAG_NEED_RTNL,
7096         },
7097         {
7098                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7099                 .doit = nl80211_tx_mgmt_cancel_wait,
7100                 .policy = nl80211_policy,
7101                 .flags = GENL_ADMIN_PERM,
7102                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7103                                   NL80211_FLAG_NEED_RTNL,
7104         },
7105         {
7106                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7107                 .doit = nl80211_set_power_save,
7108                 .policy = nl80211_policy,
7109                 .flags = GENL_ADMIN_PERM,
7110                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7111                                   NL80211_FLAG_NEED_RTNL,
7112         },
7113         {
7114                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7115                 .doit = nl80211_get_power_save,
7116                 .policy = nl80211_policy,
7117                 /* can be retrieved by unprivileged users */
7118                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7119                                   NL80211_FLAG_NEED_RTNL,
7120         },
7121         {
7122                 .cmd = NL80211_CMD_SET_CQM,
7123                 .doit = nl80211_set_cqm,
7124                 .policy = nl80211_policy,
7125                 .flags = GENL_ADMIN_PERM,
7126                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7127                                   NL80211_FLAG_NEED_RTNL,
7128         },
7129         {
7130                 .cmd = NL80211_CMD_SET_CHANNEL,
7131                 .doit = nl80211_set_channel,
7132                 .policy = nl80211_policy,
7133                 .flags = GENL_ADMIN_PERM,
7134                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7135                                   NL80211_FLAG_NEED_RTNL,
7136         },
7137         {
7138                 .cmd = NL80211_CMD_SET_WDS_PEER,
7139                 .doit = nl80211_set_wds_peer,
7140                 .policy = nl80211_policy,
7141                 .flags = GENL_ADMIN_PERM,
7142                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7143                                   NL80211_FLAG_NEED_RTNL,
7144         },
7145         {
7146                 .cmd = NL80211_CMD_JOIN_MESH,
7147                 .doit = nl80211_join_mesh,
7148                 .policy = nl80211_policy,
7149                 .flags = GENL_ADMIN_PERM,
7150                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7151                                   NL80211_FLAG_NEED_RTNL,
7152         },
7153         {
7154                 .cmd = NL80211_CMD_LEAVE_MESH,
7155                 .doit = nl80211_leave_mesh,
7156                 .policy = nl80211_policy,
7157                 .flags = GENL_ADMIN_PERM,
7158                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7159                                   NL80211_FLAG_NEED_RTNL,
7160         },
7161         {
7162                 .cmd = NL80211_CMD_GET_WOWLAN,
7163                 .doit = nl80211_get_wowlan,
7164                 .policy = nl80211_policy,
7165                 /* can be retrieved by unprivileged users */
7166                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7167                                   NL80211_FLAG_NEED_RTNL,
7168         },
7169         {
7170                 .cmd = NL80211_CMD_SET_WOWLAN,
7171                 .doit = nl80211_set_wowlan,
7172                 .policy = nl80211_policy,
7173                 .flags = GENL_ADMIN_PERM,
7174                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7175                                   NL80211_FLAG_NEED_RTNL,
7176         },
7177         {
7178                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7179                 .doit = nl80211_set_rekey_data,
7180                 .policy = nl80211_policy,
7181                 .flags = GENL_ADMIN_PERM,
7182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7183                                   NL80211_FLAG_NEED_RTNL,
7184         },
7185         {
7186                 .cmd = NL80211_CMD_TDLS_MGMT,
7187                 .doit = nl80211_tdls_mgmt,
7188                 .policy = nl80211_policy,
7189                 .flags = GENL_ADMIN_PERM,
7190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7191                                   NL80211_FLAG_NEED_RTNL,
7192         },
7193         {
7194                 .cmd = NL80211_CMD_TDLS_OPER,
7195                 .doit = nl80211_tdls_oper,
7196                 .policy = nl80211_policy,
7197                 .flags = GENL_ADMIN_PERM,
7198                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7199                                   NL80211_FLAG_NEED_RTNL,
7200         },
7201         {
7202                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7203                 .doit = nl80211_register_unexpected_frame,
7204                 .policy = nl80211_policy,
7205                 .flags = GENL_ADMIN_PERM,
7206                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7207                                   NL80211_FLAG_NEED_RTNL,
7208         },
7209         {
7210                 .cmd = NL80211_CMD_PROBE_CLIENT,
7211                 .doit = nl80211_probe_client,
7212                 .policy = nl80211_policy,
7213                 .flags = GENL_ADMIN_PERM,
7214                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7215                                   NL80211_FLAG_NEED_RTNL,
7216         },
7217         {
7218                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7219                 .doit = nl80211_register_beacons,
7220                 .policy = nl80211_policy,
7221                 .flags = GENL_ADMIN_PERM,
7222                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7223                                   NL80211_FLAG_NEED_RTNL,
7224         },
7225         {
7226                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7227                 .doit = nl80211_set_noack_map,
7228                 .policy = nl80211_policy,
7229                 .flags = GENL_ADMIN_PERM,
7230                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7231                                   NL80211_FLAG_NEED_RTNL,
7232         },
7233
7234 };
7235
7236 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7237         .name = "mlme",
7238 };
7239
7240 /* multicast groups */
7241 static struct genl_multicast_group nl80211_config_mcgrp = {
7242         .name = "config",
7243 };
7244 static struct genl_multicast_group nl80211_scan_mcgrp = {
7245         .name = "scan",
7246 };
7247 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7248         .name = "regulatory",
7249 };
7250
7251 /* notification functions */
7252
7253 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7254 {
7255         struct sk_buff *msg;
7256
7257         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7258         if (!msg)
7259                 return;
7260
7261         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7262                 nlmsg_free(msg);
7263                 return;
7264         }
7265
7266         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7267                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7268 }
7269
7270 static int nl80211_add_scan_req(struct sk_buff *msg,
7271                                 struct cfg80211_registered_device *rdev)
7272 {
7273         struct cfg80211_scan_request *req = rdev->scan_req;
7274         struct nlattr *nest;
7275         int i;
7276
7277         ASSERT_RDEV_LOCK(rdev);
7278
7279         if (WARN_ON(!req))
7280                 return 0;
7281
7282         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7283         if (!nest)
7284                 goto nla_put_failure;
7285         for (i = 0; i < req->n_ssids; i++) {
7286                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7287                         goto nla_put_failure;
7288         }
7289         nla_nest_end(msg, nest);
7290
7291         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7292         if (!nest)
7293                 goto nla_put_failure;
7294         for (i = 0; i < req->n_channels; i++) {
7295                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7296                         goto nla_put_failure;
7297         }
7298         nla_nest_end(msg, nest);
7299
7300         if (req->ie &&
7301             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7302                 goto nla_put_failure;
7303
7304         return 0;
7305  nla_put_failure:
7306         return -ENOBUFS;
7307 }
7308
7309 static int nl80211_send_scan_msg(struct sk_buff *msg,
7310                                  struct cfg80211_registered_device *rdev,
7311                                  struct net_device *netdev,
7312                                  u32 pid, u32 seq, int flags,
7313                                  u32 cmd)
7314 {
7315         void *hdr;
7316
7317         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7318         if (!hdr)
7319                 return -1;
7320
7321         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7322             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7323                 goto nla_put_failure;
7324
7325         /* ignore errors and send incomplete event anyway */
7326         nl80211_add_scan_req(msg, rdev);
7327
7328         return genlmsg_end(msg, hdr);
7329
7330  nla_put_failure:
7331         genlmsg_cancel(msg, hdr);
7332         return -EMSGSIZE;
7333 }
7334
7335 static int
7336 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7337                             struct cfg80211_registered_device *rdev,
7338                             struct net_device *netdev,
7339                             u32 pid, u32 seq, int flags, u32 cmd)
7340 {
7341         void *hdr;
7342
7343         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7344         if (!hdr)
7345                 return -1;
7346
7347         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7348             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7349                 goto nla_put_failure;
7350
7351         return genlmsg_end(msg, hdr);
7352
7353  nla_put_failure:
7354         genlmsg_cancel(msg, hdr);
7355         return -EMSGSIZE;
7356 }
7357
7358 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7359                              struct net_device *netdev)
7360 {
7361         struct sk_buff *msg;
7362
7363         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7364         if (!msg)
7365                 return;
7366
7367         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7368                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7369                 nlmsg_free(msg);
7370                 return;
7371         }
7372
7373         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7374                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7375 }
7376
7377 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7378                             struct net_device *netdev)
7379 {
7380         struct sk_buff *msg;
7381
7382         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7383         if (!msg)
7384                 return;
7385
7386         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7387                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7388                 nlmsg_free(msg);
7389                 return;
7390         }
7391
7392         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7393                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7394 }
7395
7396 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7397                                struct net_device *netdev)
7398 {
7399         struct sk_buff *msg;
7400
7401         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7402         if (!msg)
7403                 return;
7404
7405         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7406                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7407                 nlmsg_free(msg);
7408                 return;
7409         }
7410
7411         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7412                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7413 }
7414
7415 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7416                                      struct net_device *netdev)
7417 {
7418         struct sk_buff *msg;
7419
7420         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7421         if (!msg)
7422                 return;
7423
7424         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7425                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7426                 nlmsg_free(msg);
7427                 return;
7428         }
7429
7430         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7431                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7432 }
7433
7434 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7435                              struct net_device *netdev, u32 cmd)
7436 {
7437         struct sk_buff *msg;
7438
7439         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7440         if (!msg)
7441                 return;
7442
7443         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7444                 nlmsg_free(msg);
7445                 return;
7446         }
7447
7448         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7449                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7450 }
7451
7452 /*
7453  * This can happen on global regulatory changes or device specific settings
7454  * based on custom world regulatory domains.
7455  */
7456 void nl80211_send_reg_change_event(struct regulatory_request *request)
7457 {
7458         struct sk_buff *msg;
7459         void *hdr;
7460
7461         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7462         if (!msg)
7463                 return;
7464
7465         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7466         if (!hdr) {
7467                 nlmsg_free(msg);
7468                 return;
7469         }
7470
7471         /* Userspace can always count this one always being set */
7472         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7473                 goto nla_put_failure;
7474
7475         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7476                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7477                                NL80211_REGDOM_TYPE_WORLD))
7478                         goto nla_put_failure;
7479         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7480                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7481                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7482                         goto nla_put_failure;
7483         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7484                    request->intersect) {
7485                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7486                                NL80211_REGDOM_TYPE_INTERSECTION))
7487                         goto nla_put_failure;
7488         } else {
7489                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7490                                NL80211_REGDOM_TYPE_COUNTRY) ||
7491                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7492                                    request->alpha2))
7493                         goto nla_put_failure;
7494         }
7495
7496         if (wiphy_idx_valid(request->wiphy_idx) &&
7497             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7498                 goto nla_put_failure;
7499
7500         genlmsg_end(msg, hdr);
7501
7502         rcu_read_lock();
7503         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7504                                 GFP_ATOMIC);
7505         rcu_read_unlock();
7506
7507         return;
7508
7509 nla_put_failure:
7510         genlmsg_cancel(msg, hdr);
7511         nlmsg_free(msg);
7512 }
7513
7514 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7515                                     struct net_device *netdev,
7516                                     const u8 *buf, size_t len,
7517                                     enum nl80211_commands cmd, gfp_t gfp)
7518 {
7519         struct sk_buff *msg;
7520         void *hdr;
7521
7522         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7523         if (!msg)
7524                 return;
7525
7526         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7527         if (!hdr) {
7528                 nlmsg_free(msg);
7529                 return;
7530         }
7531
7532         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7533             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7534             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7535                 goto nla_put_failure;
7536
7537         genlmsg_end(msg, hdr);
7538
7539         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7540                                 nl80211_mlme_mcgrp.id, gfp);
7541         return;
7542
7543  nla_put_failure:
7544         genlmsg_cancel(msg, hdr);
7545         nlmsg_free(msg);
7546 }
7547
7548 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7549                           struct net_device *netdev, const u8 *buf,
7550                           size_t len, gfp_t gfp)
7551 {
7552         nl80211_send_mlme_event(rdev, netdev, buf, len,
7553                                 NL80211_CMD_AUTHENTICATE, gfp);
7554 }
7555
7556 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7557                            struct net_device *netdev, const u8 *buf,
7558                            size_t len, gfp_t gfp)
7559 {
7560         nl80211_send_mlme_event(rdev, netdev, buf, len,
7561                                 NL80211_CMD_ASSOCIATE, gfp);
7562 }
7563
7564 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7565                          struct net_device *netdev, const u8 *buf,
7566                          size_t len, gfp_t gfp)
7567 {
7568         nl80211_send_mlme_event(rdev, netdev, buf, len,
7569                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7570 }
7571
7572 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7573                            struct net_device *netdev, const u8 *buf,
7574                            size_t len, gfp_t gfp)
7575 {
7576         nl80211_send_mlme_event(rdev, netdev, buf, len,
7577                                 NL80211_CMD_DISASSOCIATE, gfp);
7578 }
7579
7580 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7581                                 struct net_device *netdev, const u8 *buf,
7582                                 size_t len, gfp_t gfp)
7583 {
7584         nl80211_send_mlme_event(rdev, netdev, buf, len,
7585                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7586 }
7587
7588 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7589                                   struct net_device *netdev, const u8 *buf,
7590                                   size_t len, gfp_t gfp)
7591 {
7592         nl80211_send_mlme_event(rdev, netdev, buf, len,
7593                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7594 }
7595
7596 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7597                                       struct net_device *netdev, int cmd,
7598                                       const u8 *addr, gfp_t gfp)
7599 {
7600         struct sk_buff *msg;
7601         void *hdr;
7602
7603         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7604         if (!msg)
7605                 return;
7606
7607         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7608         if (!hdr) {
7609                 nlmsg_free(msg);
7610                 return;
7611         }
7612
7613         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7614             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7615             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7616             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7617                 goto nla_put_failure;
7618
7619         genlmsg_end(msg, hdr);
7620
7621         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7622                                 nl80211_mlme_mcgrp.id, gfp);
7623         return;
7624
7625  nla_put_failure:
7626         genlmsg_cancel(msg, hdr);
7627         nlmsg_free(msg);
7628 }
7629
7630 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7631                                struct net_device *netdev, const u8 *addr,
7632                                gfp_t gfp)
7633 {
7634         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7635                                   addr, gfp);
7636 }
7637
7638 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7639                                 struct net_device *netdev, const u8 *addr,
7640                                 gfp_t gfp)
7641 {
7642         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7643                                   addr, gfp);
7644 }
7645
7646 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7647                                  struct net_device *netdev, const u8 *bssid,
7648                                  const u8 *req_ie, size_t req_ie_len,
7649                                  const u8 *resp_ie, size_t resp_ie_len,
7650                                  u16 status, gfp_t gfp)
7651 {
7652         struct sk_buff *msg;
7653         void *hdr;
7654
7655         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7656         if (!msg)
7657                 return;
7658
7659         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7660         if (!hdr) {
7661                 nlmsg_free(msg);
7662                 return;
7663         }
7664
7665         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7666             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7667             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7668             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7669             (req_ie &&
7670              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7671             (resp_ie &&
7672              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7673                 goto nla_put_failure;
7674
7675         genlmsg_end(msg, hdr);
7676
7677         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7678                                 nl80211_mlme_mcgrp.id, gfp);
7679         return;
7680
7681  nla_put_failure:
7682         genlmsg_cancel(msg, hdr);
7683         nlmsg_free(msg);
7684
7685 }
7686
7687 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7688                          struct net_device *netdev, const u8 *bssid,
7689                          const u8 *req_ie, size_t req_ie_len,
7690                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7691 {
7692         struct sk_buff *msg;
7693         void *hdr;
7694
7695         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7696         if (!msg)
7697                 return;
7698
7699         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7700         if (!hdr) {
7701                 nlmsg_free(msg);
7702                 return;
7703         }
7704
7705         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7706             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7707             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7708             (req_ie &&
7709              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7710             (resp_ie &&
7711              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7712                 goto nla_put_failure;
7713
7714         genlmsg_end(msg, hdr);
7715
7716         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7717                                 nl80211_mlme_mcgrp.id, gfp);
7718         return;
7719
7720  nla_put_failure:
7721         genlmsg_cancel(msg, hdr);
7722         nlmsg_free(msg);
7723
7724 }
7725
7726 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7727                                struct net_device *netdev, u16 reason,
7728                                const u8 *ie, size_t ie_len, bool from_ap)
7729 {
7730         struct sk_buff *msg;
7731         void *hdr;
7732
7733         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7734         if (!msg)
7735                 return;
7736
7737         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7738         if (!hdr) {
7739                 nlmsg_free(msg);
7740                 return;
7741         }
7742
7743         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7744             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7745             (from_ap && reason &&
7746              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7747             (from_ap &&
7748              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7749             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7750                 goto nla_put_failure;
7751
7752         genlmsg_end(msg, hdr);
7753
7754         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7755                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7756         return;
7757
7758  nla_put_failure:
7759         genlmsg_cancel(msg, hdr);
7760         nlmsg_free(msg);
7761
7762 }
7763
7764 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7765                              struct net_device *netdev, const u8 *bssid,
7766                              gfp_t gfp)
7767 {
7768         struct sk_buff *msg;
7769         void *hdr;
7770
7771         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7772         if (!msg)
7773                 return;
7774
7775         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7776         if (!hdr) {
7777                 nlmsg_free(msg);
7778                 return;
7779         }
7780
7781         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7782             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7783             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7784                 goto nla_put_failure;
7785
7786         genlmsg_end(msg, hdr);
7787
7788         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7789                                 nl80211_mlme_mcgrp.id, gfp);
7790         return;
7791
7792  nla_put_failure:
7793         genlmsg_cancel(msg, hdr);
7794         nlmsg_free(msg);
7795 }
7796
7797 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7798                 struct net_device *netdev,
7799                 const u8 *macaddr, const u8* ie, u8 ie_len,
7800                 gfp_t gfp)
7801 {
7802         struct sk_buff *msg;
7803         void *hdr;
7804
7805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7806         if (!msg)
7807                 return;
7808
7809         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7810         if (!hdr) {
7811                 nlmsg_free(msg);
7812                 return;
7813         }
7814
7815         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7816             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7817             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7818             (ie_len && ie &&
7819              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7820                 goto nla_put_failure;
7821
7822         genlmsg_end(msg, hdr);
7823
7824         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7825                                 nl80211_mlme_mcgrp.id, gfp);
7826         return;
7827
7828  nla_put_failure:
7829         genlmsg_cancel(msg, hdr);
7830         nlmsg_free(msg);
7831 }
7832
7833 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7834                                  struct net_device *netdev, const u8 *addr,
7835                                  enum nl80211_key_type key_type, int key_id,
7836                                  const u8 *tsc, gfp_t gfp)
7837 {
7838         struct sk_buff *msg;
7839         void *hdr;
7840
7841         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7842         if (!msg)
7843                 return;
7844
7845         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7846         if (!hdr) {
7847                 nlmsg_free(msg);
7848                 return;
7849         }
7850
7851         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7852             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7853             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7854             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7855             (key_id != -1 &&
7856              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7857             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7858                 goto nla_put_failure;
7859
7860         genlmsg_end(msg, hdr);
7861
7862         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7863                                 nl80211_mlme_mcgrp.id, gfp);
7864         return;
7865
7866  nla_put_failure:
7867         genlmsg_cancel(msg, hdr);
7868         nlmsg_free(msg);
7869 }
7870
7871 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7872                                     struct ieee80211_channel *channel_before,
7873                                     struct ieee80211_channel *channel_after)
7874 {
7875         struct sk_buff *msg;
7876         void *hdr;
7877         struct nlattr *nl_freq;
7878
7879         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7880         if (!msg)
7881                 return;
7882
7883         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7884         if (!hdr) {
7885                 nlmsg_free(msg);
7886                 return;
7887         }
7888
7889         /*
7890          * Since we are applying the beacon hint to a wiphy we know its
7891          * wiphy_idx is valid
7892          */
7893         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7894                 goto nla_put_failure;
7895
7896         /* Before */
7897         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7898         if (!nl_freq)
7899                 goto nla_put_failure;
7900         if (nl80211_msg_put_channel(msg, channel_before))
7901                 goto nla_put_failure;
7902         nla_nest_end(msg, nl_freq);
7903
7904         /* After */
7905         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7906         if (!nl_freq)
7907                 goto nla_put_failure;
7908         if (nl80211_msg_put_channel(msg, channel_after))
7909                 goto nla_put_failure;
7910         nla_nest_end(msg, nl_freq);
7911
7912         genlmsg_end(msg, hdr);
7913
7914         rcu_read_lock();
7915         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7916                                 GFP_ATOMIC);
7917         rcu_read_unlock();
7918
7919         return;
7920
7921 nla_put_failure:
7922         genlmsg_cancel(msg, hdr);
7923         nlmsg_free(msg);
7924 }
7925
7926 static void nl80211_send_remain_on_chan_event(
7927         int cmd, struct cfg80211_registered_device *rdev,
7928         struct net_device *netdev, u64 cookie,
7929         struct ieee80211_channel *chan,
7930         enum nl80211_channel_type channel_type,
7931         unsigned int duration, gfp_t gfp)
7932 {
7933         struct sk_buff *msg;
7934         void *hdr;
7935
7936         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7937         if (!msg)
7938                 return;
7939
7940         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7941         if (!hdr) {
7942                 nlmsg_free(msg);
7943                 return;
7944         }
7945
7946         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7947             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7948             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7949             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7950             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7951                 goto nla_put_failure;
7952
7953         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7954             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7955                 goto nla_put_failure;
7956
7957         genlmsg_end(msg, hdr);
7958
7959         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7960                                 nl80211_mlme_mcgrp.id, gfp);
7961         return;
7962
7963  nla_put_failure:
7964         genlmsg_cancel(msg, hdr);
7965         nlmsg_free(msg);
7966 }
7967
7968 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7969                                     struct net_device *netdev, u64 cookie,
7970                                     struct ieee80211_channel *chan,
7971                                     enum nl80211_channel_type channel_type,
7972                                     unsigned int duration, gfp_t gfp)
7973 {
7974         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7975                                           rdev, netdev, cookie, chan,
7976                                           channel_type, duration, gfp);
7977 }
7978
7979 void nl80211_send_remain_on_channel_cancel(
7980         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7981         u64 cookie, struct ieee80211_channel *chan,
7982         enum nl80211_channel_type channel_type, gfp_t gfp)
7983 {
7984         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7985                                           rdev, netdev, cookie, chan,
7986                                           channel_type, 0, gfp);
7987 }
7988
7989 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7990                             struct net_device *dev, const u8 *mac_addr,
7991                             struct station_info *sinfo, gfp_t gfp)
7992 {
7993         struct sk_buff *msg;
7994
7995         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7996         if (!msg)
7997                 return;
7998
7999         if (nl80211_send_station(msg, 0, 0, 0,
8000                                  rdev, dev, mac_addr, sinfo) < 0) {
8001                 nlmsg_free(msg);
8002                 return;
8003         }
8004
8005         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8006                                 nl80211_mlme_mcgrp.id, gfp);
8007 }
8008
8009 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8010                                 struct net_device *dev, const u8 *mac_addr,
8011                                 gfp_t gfp)
8012 {
8013         struct sk_buff *msg;
8014         void *hdr;
8015
8016         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8017         if (!msg)
8018                 return;
8019
8020         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8021         if (!hdr) {
8022                 nlmsg_free(msg);
8023                 return;
8024         }
8025
8026         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8027             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8028                 goto nla_put_failure;
8029
8030         genlmsg_end(msg, hdr);
8031
8032         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8033                                 nl80211_mlme_mcgrp.id, gfp);
8034         return;
8035
8036  nla_put_failure:
8037         genlmsg_cancel(msg, hdr);
8038         nlmsg_free(msg);
8039 }
8040
8041 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8042                                        const u8 *addr, gfp_t gfp)
8043 {
8044         struct wireless_dev *wdev = dev->ieee80211_ptr;
8045         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8046         struct sk_buff *msg;
8047         void *hdr;
8048         int err;
8049         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8050
8051         if (!nlpid)
8052                 return false;
8053
8054         msg = nlmsg_new(100, gfp);
8055         if (!msg)
8056                 return true;
8057
8058         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8059         if (!hdr) {
8060                 nlmsg_free(msg);
8061                 return true;
8062         }
8063
8064         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8065             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8066             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8067                 goto nla_put_failure;
8068
8069         err = genlmsg_end(msg, hdr);
8070         if (err < 0) {
8071                 nlmsg_free(msg);
8072                 return true;
8073         }
8074
8075         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8076         return true;
8077
8078  nla_put_failure:
8079         genlmsg_cancel(msg, hdr);
8080         nlmsg_free(msg);
8081         return true;
8082 }
8083
8084 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8085 {
8086         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8087                                           addr, gfp);
8088 }
8089
8090 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8091                                     const u8 *addr, gfp_t gfp)
8092 {
8093         return __nl80211_unexpected_frame(dev,
8094                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8095                                           addr, gfp);
8096 }
8097
8098 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8099                       struct net_device *netdev, u32 nlpid,
8100                       int freq, int sig_dbm,
8101                       const u8 *buf, size_t len, gfp_t gfp)
8102 {
8103         struct sk_buff *msg;
8104         void *hdr;
8105
8106         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8107         if (!msg)
8108                 return -ENOMEM;
8109
8110         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8111         if (!hdr) {
8112                 nlmsg_free(msg);
8113                 return -ENOMEM;
8114         }
8115
8116         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8117             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8118             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8119             (sig_dbm &&
8120              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8121             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8122                 goto nla_put_failure;
8123
8124         genlmsg_end(msg, hdr);
8125
8126         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8127
8128  nla_put_failure:
8129         genlmsg_cancel(msg, hdr);
8130         nlmsg_free(msg);
8131         return -ENOBUFS;
8132 }
8133
8134 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8135                                  struct net_device *netdev, u64 cookie,
8136                                  const u8 *buf, size_t len, bool ack,
8137                                  gfp_t gfp)
8138 {
8139         struct sk_buff *msg;
8140         void *hdr;
8141
8142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8143         if (!msg)
8144                 return;
8145
8146         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8147         if (!hdr) {
8148                 nlmsg_free(msg);
8149                 return;
8150         }
8151
8152         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8153             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8154             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8155             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8156             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8157                 goto nla_put_failure;
8158
8159         genlmsg_end(msg, hdr);
8160
8161         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8162         return;
8163
8164  nla_put_failure:
8165         genlmsg_cancel(msg, hdr);
8166         nlmsg_free(msg);
8167 }
8168
8169 void
8170 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8171                              struct net_device *netdev,
8172                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8173                              gfp_t gfp)
8174 {
8175         struct sk_buff *msg;
8176         struct nlattr *pinfoattr;
8177         void *hdr;
8178
8179         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8180         if (!msg)
8181                 return;
8182
8183         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8184         if (!hdr) {
8185                 nlmsg_free(msg);
8186                 return;
8187         }
8188
8189         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8190             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8191                 goto nla_put_failure;
8192
8193         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8194         if (!pinfoattr)
8195                 goto nla_put_failure;
8196
8197         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8198                         rssi_event))
8199                 goto nla_put_failure;
8200
8201         nla_nest_end(msg, pinfoattr);
8202
8203         genlmsg_end(msg, hdr);
8204
8205         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8206                                 nl80211_mlme_mcgrp.id, gfp);
8207         return;
8208
8209  nla_put_failure:
8210         genlmsg_cancel(msg, hdr);
8211         nlmsg_free(msg);
8212 }
8213
8214 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8215                               struct net_device *netdev, const u8 *bssid,
8216                               const u8 *replay_ctr, gfp_t gfp)
8217 {
8218         struct sk_buff *msg;
8219         struct nlattr *rekey_attr;
8220         void *hdr;
8221
8222         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8223         if (!msg)
8224                 return;
8225
8226         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8227         if (!hdr) {
8228                 nlmsg_free(msg);
8229                 return;
8230         }
8231
8232         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8233             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8234             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8235                 goto nla_put_failure;
8236
8237         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8238         if (!rekey_attr)
8239                 goto nla_put_failure;
8240
8241         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8242                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8243                 goto nla_put_failure;
8244
8245         nla_nest_end(msg, rekey_attr);
8246
8247         genlmsg_end(msg, hdr);
8248
8249         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8250                                 nl80211_mlme_mcgrp.id, gfp);
8251         return;
8252
8253  nla_put_failure:
8254         genlmsg_cancel(msg, hdr);
8255         nlmsg_free(msg);
8256 }
8257
8258 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8259                                     struct net_device *netdev, int index,
8260                                     const u8 *bssid, bool preauth, gfp_t gfp)
8261 {
8262         struct sk_buff *msg;
8263         struct nlattr *attr;
8264         void *hdr;
8265
8266         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8267         if (!msg)
8268                 return;
8269
8270         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8271         if (!hdr) {
8272                 nlmsg_free(msg);
8273                 return;
8274         }
8275
8276         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8277             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8278                 goto nla_put_failure;
8279
8280         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8281         if (!attr)
8282                 goto nla_put_failure;
8283
8284         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8285             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8286             (preauth &&
8287              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8288                 goto nla_put_failure;
8289
8290         nla_nest_end(msg, attr);
8291
8292         genlmsg_end(msg, hdr);
8293
8294         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8295                                 nl80211_mlme_mcgrp.id, gfp);
8296         return;
8297
8298  nla_put_failure:
8299         genlmsg_cancel(msg, hdr);
8300         nlmsg_free(msg);
8301 }
8302
8303 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8304                               struct net_device *netdev, int freq,
8305                               enum nl80211_channel_type type, gfp_t gfp)
8306 {
8307         struct sk_buff *msg;
8308         void *hdr;
8309
8310         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8311         if (!msg)
8312                 return;
8313
8314         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8315         if (!hdr) {
8316                 nlmsg_free(msg);
8317                 return;
8318         }
8319
8320         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8321             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8322             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8323                 goto nla_put_failure;
8324
8325         genlmsg_end(msg, hdr);
8326
8327         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8328                                 nl80211_mlme_mcgrp.id, gfp);
8329         return;
8330
8331  nla_put_failure:
8332         genlmsg_cancel(msg, hdr);
8333         nlmsg_free(msg);
8334 }
8335
8336 void
8337 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8338                                 struct net_device *netdev, const u8 *peer,
8339                                 u32 num_packets, gfp_t gfp)
8340 {
8341         struct sk_buff *msg;
8342         struct nlattr *pinfoattr;
8343         void *hdr;
8344
8345         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8346         if (!msg)
8347                 return;
8348
8349         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8350         if (!hdr) {
8351                 nlmsg_free(msg);
8352                 return;
8353         }
8354
8355         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8356             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8357             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8358                 goto nla_put_failure;
8359
8360         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8361         if (!pinfoattr)
8362                 goto nla_put_failure;
8363
8364         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8365                 goto nla_put_failure;
8366
8367         nla_nest_end(msg, pinfoattr);
8368
8369         genlmsg_end(msg, hdr);
8370
8371         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8372                                 nl80211_mlme_mcgrp.id, gfp);
8373         return;
8374
8375  nla_put_failure:
8376         genlmsg_cancel(msg, hdr);
8377         nlmsg_free(msg);
8378 }
8379
8380 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8381                            u64 cookie, bool acked, gfp_t gfp)
8382 {
8383         struct wireless_dev *wdev = dev->ieee80211_ptr;
8384         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8385         struct sk_buff *msg;
8386         void *hdr;
8387         int err;
8388
8389         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8390         if (!msg)
8391                 return;
8392
8393         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8394         if (!hdr) {
8395                 nlmsg_free(msg);
8396                 return;
8397         }
8398
8399         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8400             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8401             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8402             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8403             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8404                 goto nla_put_failure;
8405
8406         err = genlmsg_end(msg, hdr);
8407         if (err < 0) {
8408                 nlmsg_free(msg);
8409                 return;
8410         }
8411
8412         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8413                                 nl80211_mlme_mcgrp.id, gfp);
8414         return;
8415
8416  nla_put_failure:
8417         genlmsg_cancel(msg, hdr);
8418         nlmsg_free(msg);
8419 }
8420 EXPORT_SYMBOL(cfg80211_probe_status);
8421
8422 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8423                                  const u8 *frame, size_t len,
8424                                  int freq, int sig_dbm, gfp_t gfp)
8425 {
8426         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8427         struct sk_buff *msg;
8428         void *hdr;
8429         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8430
8431         if (!nlpid)
8432                 return;
8433
8434         msg = nlmsg_new(len + 100, gfp);
8435         if (!msg)
8436                 return;
8437
8438         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8439         if (!hdr) {
8440                 nlmsg_free(msg);
8441                 return;
8442         }
8443
8444         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8445             (freq &&
8446              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8447             (sig_dbm &&
8448              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8449             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8450                 goto nla_put_failure;
8451
8452         genlmsg_end(msg, hdr);
8453
8454         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8455         return;
8456
8457  nla_put_failure:
8458         genlmsg_cancel(msg, hdr);
8459         nlmsg_free(msg);
8460 }
8461 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8462
8463 static int nl80211_netlink_notify(struct notifier_block * nb,
8464                                   unsigned long state,
8465                                   void *_notify)
8466 {
8467         struct netlink_notify *notify = _notify;
8468         struct cfg80211_registered_device *rdev;
8469         struct wireless_dev *wdev;
8470
8471         if (state != NETLINK_URELEASE)
8472                 return NOTIFY_DONE;
8473
8474         rcu_read_lock();
8475
8476         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8477                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8478                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8479                 if (rdev->ap_beacons_nlpid == notify->pid)
8480                         rdev->ap_beacons_nlpid = 0;
8481         }
8482
8483         rcu_read_unlock();
8484
8485         return NOTIFY_DONE;
8486 }
8487
8488 static struct notifier_block nl80211_netlink_notifier = {
8489         .notifier_call = nl80211_netlink_notify,
8490 };
8491
8492 /* initialisation/exit functions */
8493
8494 int nl80211_init(void)
8495 {
8496         int err;
8497
8498         err = genl_register_family_with_ops(&nl80211_fam,
8499                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8500         if (err)
8501                 return err;
8502
8503         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8504         if (err)
8505                 goto err_out;
8506
8507         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8508         if (err)
8509                 goto err_out;
8510
8511         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8512         if (err)
8513                 goto err_out;
8514
8515         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8516         if (err)
8517                 goto err_out;
8518
8519 #ifdef CONFIG_NL80211_TESTMODE
8520         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8521         if (err)
8522                 goto err_out;
8523 #endif
8524
8525         err = netlink_register_notifier(&nl80211_netlink_notifier);
8526         if (err)
8527                 goto err_out;
8528
8529         return 0;
8530  err_out:
8531         genl_unregister_family(&nl80211_fam);
8532         return err;
8533 }
8534
8535 void nl80211_exit(void)
8536 {
8537         netlink_unregister_notifier(&nl80211_netlink_notifier);
8538         genl_unregister_family(&nl80211_fam);
8539 }